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CFX13.0-Pre User Guide


ANSYS CFX-Pre User's Guide

ANSYS, Inc. Southpointe 275 Technology Drive Canonsburg, PA 15317 ansysinfo@ansys.com http://www.ansys.com (T) 724-746-3304 (F) 724-514-9494

Release 13.0 November 2010
ANSYS, Inc. is certified to ISO 9001:2008.

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Table of Contents
1. CFX-Pre Basics ......................................................................................................................................... 1 1.1. Starting CFX-Pre ............................................................................................................................... 1 1.2. CFX-Pre Modes of Operation ............................................................................................................. 2 1.3. Working with the CFX-Pre Interface ................................................................................................... 3 1.3.1. Viewer ..................................................................................................................................... 4 1.3.2. CFX-Pre Workspace .................................................................................................................. 4 1.3.2.1. Outline Tree View ............................................................................................................ 5 1.3.2.1.1. General Considerations ........................................................................................... 5 1.3.2.1.2. Outline Tree View Structure ..................................................................................... 5 1.3.2.1.2.1. Mesh ............................................................................................................. 5 1.3.2.1.2.2. Simulation ..................................................................................................... 5 1.3.2.1.2.2.1. Analysis ................................................................................................. 6 1.3.2.1.2.2.1.1. Analysis Type ................................................................................ 6 1.3.2.1.2.2.1.2. Domains ....................................................................................... 6 1.3.2.1.2.2.1.3. Domain Interfaces ........................................................................ 6 1.3.2.1.2.2.1.4. Global Initialization ....................................................................... 6 1.3.2.1.2.2.1.5. Solver ........................................................................................... 6 1.3.2.1.2.2.2. Coordinate Frame .................................................................................. 6 1.3.2.1.2.2.3. Materials / Reactions .............................................................................. 6 1.3.2.1.2.2.4. Expressions, Functions, and Variables ...................................................... 6 1.3.2.1.2.3. Simulation Control ......................................................................................... 7 1.3.2.1.2.4. Case Options .................................................................................................. 7 1.3.2.1.2.5. Extensions ..................................................................................................... 7 1.3.2.1.2.6. Outline Tree View Shortcut Menu Commands ................................................. 7 1.3.2.2. Details View ................................................................................................................... 10 1.3.3. Physics Message Window ....................................................................................................... 11 1.3.3.1. Physics Errors from Old .def/.res Files .............................................................................. 12 1.3.3.2. Physics Message Window Shortcut Menu Commands ..................................................... 12 1.3.4. Menu Bar ............................................................................................................................... 13 1.3.4.1. File Menu ...................................................................................................................... 13 1.3.4.2. Edit Menu ...................................................................................................................... 13 1.3.4.3. Session Menu ................................................................................................................ 13 1.3.4.4. Insert Menu ................................................................................................................... 13 1.3.4.5. Tools Menu .................................................................................................................... 13 1.3.4.6. Extensions Menu ........................................................................................................... 13 1.3.4.7. Help Menu .................................................................................................................... 13 1.3.5. Toolbar .................................................................................................................................. 14 1.3.6. CFX-Pre File Types .................................................................................................................. 14 1.3.6.1. Case Files (.cfx) .............................................................................................................. 14 1.3.6.2. Mesh Files ..................................................................................................................... 14 1.3.6.3. CFX-Solver Input Files (.def, .mdef ) ................................................................................. 14 1.3.6.4. CFX-Solver Results Files (.res, .mres, .trn, .bak) .................................................................. 15 1.3.6.5. CFX-Solver Backup Results Files (.bak) ............................................................................ 15 1.3.6.6. CFX-Solver Transient Results Files (.trn) ........................................................................... 15 1.3.6.7. CFX-Solver Error Results Files (.err) ................................................................................. 15 1.3.6.8. Session Files (.pre) ......................................................................................................... 15 1.3.6.9. CCL Files (.ccl) ................................................................................................................ 15 2. CFX-Pre 3D Viewer ................................................................................................................................ 17 2.1. Object Visibility ............................................................................................................................... 18 2.2. 3D Viewer Modes and Commands ................................................................................................... 19
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ANSYS CFX-Pre User's Guide 2.2.1. 3D Viewer Toolbar .................................................................................................................. 19 2.2.2. Shortcut Menus ..................................................................................................................... 21 2.2.2.1. CFX-Pre 3D Viewer Shortcut Menu ................................................................................. 22 2.2.2.1.1. Shortcuts for CFX-Pre (Viewer Background) ........................................................... 22 2.2.2.1.2. Shortcuts for CFX-Pre (Viewer Object) ................................................................... 23 2.2.3. Viewer Keys ............................................................................................................................ 23 2.2.4. Mouse Button Mapping .......................................................................................................... 24 2.2.5. Picking Mode ......................................................................................................................... 26 2.2.5.1. Selecting Objects .......................................................................................................... 26 2.2.6. Boundary Markers and Labels ................................................................................................. 27 2.2.6.1. Label Options ................................................................................................................ 27 2.2.6.2. Boundary Markers ......................................................................................................... 27 2.2.6.3. Boundary Vectors .......................................................................................................... 27 2.3. Views and Figures ........................................................................................................................... 27 2.3.1. Switching to a View or Figure .................................................................................................. 28 2.3.2. Changing the Definition of a View or Figure ............................................................................ 28 2.4. Stereo Viewer ................................................................................................................................. 28 3. CFX-Pre File Menu ................................................................................................................................. 31 3.1. New Case Command ....................................................................................................................... 31 3.2. Open Case Command ..................................................................................................................... 32 3.2.1. Recover Original Session ........................................................................................................ 32 3.2.2. Opening Case (.cfx) Files ......................................................................................................... 33 3.2.3. Opening CFX-Solver Input (.def, .mdef ), Results (.res), Transient (.trn) or Backup (.bak) Files ....... 33 3.2.4. Opening CCL (.ccl) Files .......................................................................................................... 33 3.2.5. Opening Meshing (.cmdb or .dsdb) Files ................................................................................. 33 3.2.6. Opening CFX-Mesh (.gtm) Files ............................................................................................... 34 3.3. Close Command ............................................................................................................................. 34 3.4. Save Case Command ....................................................................................................................... 34 3.5. Save Project Command ................................................................................................................... 34 3.6. Refresh Command (ANSYS Workbench only) ................................................................................... 34 3.7. Save Case As Command .................................................................................................................. 34 3.8. Import Mesh Command .................................................................................................................. 34 3.9. Reload Mesh Files Command .......................................................................................................... 34 3.10. Import CCL Command .................................................................................................................. 35 3.10.1. Append or Replace ............................................................................................................... 35 3.10.1.1. Append ....................................................................................................................... 35 3.10.1.2. Replace ....................................................................................................................... 36 3.10.1.2.1. Auto-load materials ............................................................................................. 36 3.11. Export CCL Command ................................................................................................................... 36 3.11.1. Save All Objects .................................................................................................................... 36 3.11.1.1. Sample of Saving CEL Expressions ................................................................................ 36 3.12. Save Picture Command ................................................................................................................. 37 3.13. Recent Case Files Submenu ........................................................................................................... 38 3.14. Recent CCL Files Submenu ............................................................................................................ 38 3.15. Recent Session Files Submenu ....................................................................................................... 38 3.16. Quit Command ............................................................................................................................. 39 4. CFX-Pre Edit Menu ................................................................................................................................ 41 4.1. Undo and Redo ............................................................................................................................... 41 4.2. Options .......................................................................................................................................... 42 4.2.1. CFX-Pre Options ..................................................................................................................... 42 4.2.1.1. General ......................................................................................................................... 42 4.2.1.1.1. Auto Generation ................................................................................................... 42
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ANSYS CFX-Pre User's Guide 4.2.1.1.2. Physics ................................................................................................................. 44 4.2.1.2. Graphics Style ............................................................................................................... 44 4.2.1.2.1. Object Highlighting .............................................................................................. 44 4.2.1.2.2. Background .......................................................................................................... 44 4.2.1.2.2.1. Color ............................................................................................................ 45 4.2.1.2.2.2. Image .......................................................................................................... 45 4.2.1.2.3. Colors ................................................................................................................... 45 4.2.1.2.3.1. Labels .......................................................................................................... 45 4.2.1.2.3.2. Legend Text and Turbo Axis .......................................................................... 45 4.2.1.2.4. Visibility ................................................................................................................ 45 4.2.1.2.4.1. Axis and Ruler Visibility ................................................................................. 45 4.2.1.3. Render .......................................................................................................................... 45 4.2.1.4. Mesh ............................................................................................................................. 45 4.2.1.4.1. Mesh Import Options ............................................................................................ 46 4.2.1.5. Turbo ............................................................................................................................ 46 4.2.1.6. Labels and Markers ........................................................................................................ 46 4.2.1.6.1. Labels ................................................................................................................... 46 4.2.1.6.2. Boundary Markers ................................................................................................. 46 4.2.1.6.3. Boundary Vectors .................................................................................................. 46 4.2.1.7. Extensions ..................................................................................................................... 46 4.2.1.8. Customization ............................................................................................................... 46 4.2.1.9. Solve ............................................................................................................................. 47 4.2.1.10. Viewer ......................................................................................................................... 47 4.2.2. Common Options ................................................................................................................... 47 4.2.2.1. Appearance ................................................................................................................... 47 4.2.2.2. Viewer Setup ................................................................................................................. 48 4.2.2.2.1. Double Buffering .................................................................................................. 48 4.2.2.2.2. Unlimited Zoom .................................................................................................... 48 4.2.2.3. Mouse Mapping ............................................................................................................ 48 4.2.2.4. Units ............................................................................................................................. 48 4.2.2.4.1. Additional Help on Units ....................................................................................... 49 5. CFX-Pre Session Menu ........................................................................................................................... 51 5.1. New Session Command .................................................................................................................. 51 5.2. Start Recording and Stop Recording Commands ............................................................................. 52 5.3. Play Session and Play Tutorial Commands ........................................................................................ 52 5.3.1. Play Session Command .......................................................................................................... 52 5.3.2. Play Tutorial Command .......................................................................................................... 53 6. CFX-Pre Insert Menu ............................................................................................................................. 55 6.1. Valid Syntax for Named Objects ....................................................................................................... 55 6.2. Analysis .......................................................................................................................................... 55 6.3. Analysis Type .................................................................................................................................. 56 6.4. Domain .......................................................................................................................................... 56 6.5. Boundary ....................................................................................................................................... 56 6.6. Subdomain ..................................................................................................................................... 56 6.7. Source Point ................................................................................................................................... 56 6.8. Domain Interface ............................................................................................................................ 56 6.9. Global Initialization ......................................................................................................................... 56 6.10. Coordinate Frame ......................................................................................................................... 56 6.11. Material / Reaction ........................................................................................................................ 56 6.12. CFX-RIF ......................................................................................................................................... 57 6.13. Regions: Composite Region / Primitive Region ............................................................................... 57 6.14. Additional Variable ........................................................................................................................ 57
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ANSYS CFX-Pre User's Guide 6.15. Expression .................................................................................................................................... 57 6.16. User Function ............................................................................................................................... 57 6.17. User Routine ................................................................................................................................. 57 6.18. Solver: Solution Units .................................................................................................................... 57 6.19. Solver: Solver Control .................................................................................................................... 57 6.20. Solver: Output Control .................................................................................................................. 58 6.21. Solver: Mesh Adaption .................................................................................................................. 58 6.22. Solver: Expert Parameter ............................................................................................................... 58 6.23. Solver: Execution Control ............................................................................................................... 58 6.24. Configurations: Configuration / Termination Control ...................................................................... 58 7. CFX-Pre Tools Menu .............................................................................................................................. 59 7.1. Command Editor ............................................................................................................................ 59 7.2. Initialize Profile Data ....................................................................................................................... 59 7.3. Macro Calculator ............................................................................................................................. 59 7.4. Solve .............................................................................................................................................. 60 7.4.1. Write Solver Input File Command ............................................................................................ 60 7.5. Applications ................................................................................................................................... 60 7.6. Quick Setup Mode .......................................................................................................................... 60 7.7. Turbo Mode .................................................................................................................................... 60 8. CFX-Pre Extensions Menu ..................................................................................................................... 61 9. Importing and Transforming Meshes ................................................................................................... 63 9.1. Importing Meshes ........................................................................................................................... 63 9.1.1. Importing Multiple Meshes .................................................................................................... 63 9.1.2. Common Import Options ....................................................................................................... 64 9.1.2.1. Mesh Units .................................................................................................................... 64 9.1.2.2. Assembly Prefix ............................................................................................................. 64 9.1.2.3. Primitive Strategy .......................................................................................................... 64 9.1.2.4. Ignore Invalid Degenerate Elements ............................................................................... 64 9.1.2.5. Duplicate Node Checking .............................................................................................. 64 9.1.3. Supported Mesh File Types ..................................................................................................... 65 9.1.3.1. ANSYS Meshing Files ..................................................................................................... 65 9.1.3.1.1. Named Selections ................................................................................................. 66 9.1.3.1.2. Contact Detection Settings ................................................................................... 66 9.1.3.2. CFX-Mesh Files .............................................................................................................. 67 9.1.3.3. CFX-Solver Input files ..................................................................................................... 67 9.1.3.4. ICEM CFD Files ............................................................................................................... 67 9.1.3.5. ANSYS Files ................................................................................................................... 67 9.1.3.6. ANSYS FLUENT Files ....................................................................................................... 68 9.1.3.6.1. Override Default 2D Mesh Settings ........................................................................ 68 9.1.3.6.1.1. Interpret 2D Mesh as .................................................................................... 68 9.1.3.6.1.1.1. Axisymmetric ...................................................................................... 68 9.1.3.6.1.1.2. Planar .................................................................................................. 68 9.1.3.7. CGNS Files ..................................................................................................................... 68 9.1.3.7.1. Importing CGNS files into CFX ............................................................................... 69 9.1.3.7.1.1. Method ........................................................................................................ 69 9.1.3.7.1.2. Base (Base_t) ................................................................................................ 69 9.1.3.7.1.3. Zone (Zone_t) .............................................................................................. 69 9.1.3.7.1.4. Elements (ElementSection_t) ........................................................................ 69 9.1.3.7.1.5. Element Types Supported ............................................................................. 69 9.1.3.7.1.6. Boundary Conditions (BC_t) ......................................................................... 69 9.1.3.7.1.7. Families (Family_t, FamilyBC_t, FamilyName_t) .............................................. 70 9.1.3.7.1.8. Grid Connectivity (GridConnectivity_t and GridConnectivity1to1_t) .............. 70
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ANSYS CFX-Pre User's Guide 9.1.3.7.1.9. CGNS Data Ignored ...................................................................................... 70 9.1.3.7.2. Prefix regions with zone name .............................................................................. 70 9.1.3.7.3. Create Regions From: Element Sections ................................................................. 70 9.1.3.7.4. Create Regions From: Boundary Conditions ........................................................... 71 9.1.3.7.5. Create Regions From: Families ............................................................................... 71 9.1.3.7.6. Create Regions From: Connectivity Mappings ........................................................ 71 9.1.3.7.7. Example of Create Regions From ........................................................................... 71 9.1.3.7.8. Read Only One CGNS Base .................................................................................... 71 9.1.3.8. CFX-TASCflow Files ........................................................................................................ 72 9.1.3.8.1. Convert 3D Region Labels to Regions .................................................................... 72 9.1.3.8.2. Grid Connections Processed (in the .grd file) .......................................................... 72 9.1.3.8.3. Grid Embedding ................................................................................................... 73 9.1.3.8.4. Retain Block-off .................................................................................................... 73 9.1.3.8.5. Regions in the .grd file .......................................................................................... 73 9.1.3.8.6. Boundary Conditions in .bcf File ............................................................................ 73 9.1.3.8.7. Regions in the .gci File ........................................................................................... 73 9.1.3.8.8. Importing CFX-TASCflow TurboPre MFR Grids ........................................................ 74 9.1.3.8.9. Parameter File ....................................................................................................... 74 9.1.3.9. CFX-4 Grid Files ............................................................................................................. 74 9.1.3.9.1. Split Symmetry Planes ........................................................................................... 75 9.1.3.9.2. Import from Cylindrical Coordinates ...................................................................... 75 9.1.3.9.3. Create 2D Regions on ............................................................................................ 75 9.1.3.9.4. Create 3D Regions on ............................................................................................ 75 9.1.3.9.5. Blocked Off Regions (SOLIDs) ................................................................................ 75 9.1.3.9.6. Conducting Solid Regions (SOLCONs) .................................................................... 75 9.1.3.9.7. Import 2D Axisymmetric Mesh .............................................................................. 76 9.1.3.9.8. Importing MFR Grids ............................................................................................. 76 9.1.3.10. CFX-BladeGenPlus Files ................................................................................................ 76 9.1.3.11. PATRAN Neutral Files .................................................................................................... 76 9.1.3.12. IDEAS Universal Files .................................................................................................... 76 9.1.3.13. GridPro/az3000 Grid Files ............................................................................................. 77 9.1.3.14. NASTRAN Files ............................................................................................................. 77 9.1.3.15. Pointwise Gridgen Files ................................................................................................ 77 9.1.3.16. User Import ................................................................................................................. 78 9.2. Mesh Tree View ............................................................................................................................... 78 9.2.1. Shortcut Menu Commands for Meshes and Regions ................................................................ 79 9.3. Deleting Meshes and Mesh Components from the Tree View ........................................................... 79 9.4. Transform Mesh Command ............................................................................................................. 79 9.4.1. Target Location ...................................................................................................................... 80 9.4.2. Reference Coord Frame .......................................................................................................... 80 9.4.3. Transformation: Rotation ........................................................................................................ 80 9.4.3.1. Rotation Option: Principal Axis ....................................................................................... 80 9.4.3.2. Rotation Option: Rotation Axis ....................................................................................... 80 9.4.3.3. Rotation Angle Option ................................................................................................... 81 9.4.3.3.1. Specified .............................................................................................................. 81 9.4.3.3.2. Full Circle .............................................................................................................. 81 9.4.3.3.3. Two Points ............................................................................................................ 81 9.4.4. Transformation: Translation ..................................................................................................... 81 9.4.4.1. Method: Deltas .............................................................................................................. 81 9.4.4.2. Method: Vectors ............................................................................................................. 81 9.4.5. Transformation: Scale ............................................................................................................. 82 9.4.5.1. Method: Uniform ........................................................................................................... 82
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ANSYS CFX-Pre User's Guide 9.4.5.2. Method: Non Uniform .................................................................................................... 82 9.4.5.3. Scale Origin ................................................................................................................... 82 9.4.5.4. Apply Scale To ............................................................................................................... 82 9.4.6. Transformation: Reflection ...................................................................................................... 82 9.4.6.1. Method ......................................................................................................................... 82 9.4.6.2. Apply Reflection To ........................................................................................................ 83 9.4.7. Transformation: Turbo Rotation ............................................................................................... 83 9.4.7.1. Rotation Option: Principal Axis ....................................................................................... 83 9.4.7.2. Rotation Option: Rotation Axis ....................................................................................... 83 9.4.7.3. Rotation Axis Options .................................................................................................... 83 9.4.8. Multiple Copies ...................................................................................................................... 84 9.4.8.1. # of Copies .................................................................................................................... 84 9.4.8.2. Delete Original .............................................................................................................. 84 9.4.9. Advanced Options ................................................................................................................. 84 9.4.9.1. Glue Adjacent Meshes ................................................................................................... 84 9.4.10. Automatic Transformation Preview ....................................................................................... 85 9.5. Gluing Meshes Together ................................................................................................................. 85 9.6. Mesh Editor .................................................................................................................................... 86 9.7. Render Options .............................................................................................................................. 86 9.7.1. Render Options Dialog Box ..................................................................................................... 86 9.7.1.1. Draw Faces .................................................................................................................... 86 9.7.1.2. Face Color ..................................................................................................................... 86 9.7.1.3. Transparency ................................................................................................................. 86 9.7.1.4. Draw Mode/Surface Drawing ......................................................................................... 86 9.7.1.4.1. Flat Shading .......................................................................................................... 87 9.7.1.4.2. Smooth Shading ................................................................................................... 87 9.7.1.5. Face Culling ................................................................................................................... 87 9.7.1.5.1. Front Faces ........................................................................................................... 87 9.7.1.5.2. Back Faces ............................................................................................................ 87 9.7.1.5.3. No Culling ............................................................................................................. 87 9.7.1.6. Lighting ........................................................................................................................ 87 9.7.1.7. Specular ........................................................................................................................ 87 9.7.1.8. Draw Lines .................................................................................................................... 87 9.7.1.9. Edge Angle/Render Edge Angle ..................................................................................... 87 9.7.1.10. Line Width ................................................................................................................... 88 9.7.1.11. Line Color .................................................................................................................... 88 9.7.1.12. Visibility ...................................................................................................................... 88 9.7.2. Render Options - Multiple 2D Regions .................................................................................... 88 9.8. Mesh Topology in CFX-Pre ............................................................................................................... 88 9.8.1. Assemblies, Primitive Regions, and Composite Regions ........................................................... 88 9.8.1.1. Composite Regions ........................................................................................................ 89 9.8.1.1.1. Applications of the Composite Regions ................................................................. 90 9.8.2. Domain and Subdomain Locations ......................................................................................... 90 9.8.3. Boundary Condition and Domain Interface Locations .............................................................. 90 9.8.4. Importing Multi-domain Cases ............................................................................................... 90 9.9. Advanced Topic: cfx5gtmconv Application ....................................................................................... 90 10. Regions ................................................................................................................................................ 91 10.1. Primitive Regions .......................................................................................................................... 91 10.2. Composite Regions ....................................................................................................................... 91 10.3. Using Regions in CFX-Pre .............................................................................................................. 92 10.4. Editing Regions in CFX-Pre ............................................................................................................ 92 10.4.1. Defining and Editing Primitive Regions ................................................................................. 92
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ANSYS CFX-Pre User's Guide 10.4.1.1. Advanced Options ....................................................................................................... 94 10.4.2. Defining and Editing Composite Regions .............................................................................. 94 10.4.2.1. Union .......................................................................................................................... 95 10.4.2.2. Alias ............................................................................................................................ 95 10.5. Applications of Composite Regions ............................................................................................... 95 11. Analysis Type ....................................................................................................................................... 97 11.1. Basic Settings Tab ......................................................................................................................... 97 11.1.1. External Solver Coupling Settings ......................................................................................... 97 11.1.2. Analysis Type Settings .......................................................................................................... 97 11.1.2.1. Steady State ................................................................................................................ 97 11.1.2.2. Transient ..................................................................................................................... 98 11.1.2.2.1. Time Duration ..................................................................................................... 98 11.1.2.2.2. Time Steps .......................................................................................................... 98 11.1.2.2.3. Initial Time .......................................................................................................... 99 12. Domains ............................................................................................................................................ 101 12.1. Creating New Domains ............................................................................................................... 101 12.2. The Details View for Domain Objects ........................................................................................... 101 12.3. Using Multiple Domains .............................................................................................................. 102 12.3.1. Multiple Fluid Domains ....................................................................................................... 102 12.3.2. Multiple Solid Domains ...................................................................................................... 103 12.4. User Interface ............................................................................................................................. 103 12.4.1. Basic Settings Tab ............................................................................................................... 103 12.4.1.1. Location and Type ...................................................................................................... 103 12.4.1.1.1. Location ............................................................................................................ 103 12.4.1.1.2. Domain Type ..................................................................................................... 103 12.4.1.1.3. Coordinate Frame ............................................................................................. 104 12.4.1.2. Fluid and Particle Definitions and Solid Definitions ..................................................... 104 12.4.1.2.1. Morphology ...................................................................................................... 105 12.4.1.2.1.1. Mean Diameter ........................................................................................ 105 12.4.1.2.1.2. Minimum Volume Fraction ........................................................................ 105 12.4.1.2.1.3. Maximum Packing .................................................................................... 105 12.4.1.2.1.4. Restitution Coefficient .............................................................................. 105 12.4.1.2.1.5. Particle Diameter Distribution ................................................................... 105 12.4.1.2.1.6. Particle Shape Factors ............................................................................... 106 12.4.1.2.1.7. Particle Diameter Change ......................................................................... 106 12.4.1.2.1.7.1. Swelling Model ................................................................................ 106 12.4.1.3. Particle Tracking ........................................................................................................ 106 12.4.1.4. Domain Models ......................................................................................................... 106 12.4.1.4.1. Pressure: Reference Pressure .............................................................................. 106 12.4.1.4.2. Buoyancy: Option .............................................................................................. 106 12.4.1.4.3. Domain Motion ................................................................................................. 107 12.4.1.4.4. Mesh Deformation ............................................................................................ 109 12.4.2. Fluid Models Tab ................................................................................................................ 109 12.4.2.1. Multiphase Options ................................................................................................... 109 12.4.2.1.1. Homogeneous Model ....................................................................................... 109 12.4.2.1.2. Free Surface Model ........................................................................................... 110 12.4.2.1.3. Multiphase Reactions ........................................................................................ 110 12.4.2.2. Heat Transfer ............................................................................................................. 110 12.4.2.2.1. Homogeneous Model ....................................................................................... 110 12.4.2.2.2. Heat Transfer: Option ......................................................................................... 110 12.4.2.3. Turbulence ................................................................................................................ 110 12.4.2.3.1. Homogeneous Model ....................................................................................... 111
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ANSYS CFX-Pre User's Guide 12.4.2.3.2. Turbulence: Option ............................................................................................ 111 12.4.2.3.3. Buoyancy Turbulence ........................................................................................ 112 12.4.2.3.4. Wall Function .................................................................................................... 112 12.4.2.3.5. Turbulent Flux Closure for Heat Transfer ............................................................. 112 12.4.2.4. Reaction or Combustion Model .................................................................................. 112 12.4.2.4.1. Soot Model ....................................................................................................... 113 12.4.2.5. Thermal Radiation Model ........................................................................................... 113 12.4.2.6. Electromagnetic Model .............................................................................................. 114 12.4.2.7. Component Details .................................................................................................... 114 12.4.2.8. Additional Variable Details ......................................................................................... 115 12.4.3. Polydispersed Fluid Tab ...................................................................................................... 115 12.4.4. Fluid Specific Models Tab .................................................................................................... 115 12.4.4.1. Fluid List Box ............................................................................................................. 115 12.4.4.2. Kinetic Theory ............................................................................................................ 116 12.4.4.3. Heat Transfer ............................................................................................................. 116 12.4.4.3.1. Heat Transfer Option: Particle Temperature ........................................................ 116 12.4.4.4. Turbulence Model ...................................................................................................... 117 12.4.4.5. Turbulent Wall Functions ............................................................................................ 117 12.4.4.6. Combustion Model .................................................................................................... 117 12.4.4.7. Erosion Model ........................................................................................................... 117 12.4.4.8. Fluid Buoyancy Model ................................................................................................ 117 12.4.4.9. Solid Pressure Model .................................................................................................. 117 12.4.4.10. Component Details .................................................................................................. 117 12.4.4.11. Additional Variable Models ....................................................................................... 118 12.4.5. Fluid Pair Models Tab .......................................................................................................... 118 12.4.5.1. Fluid Pair List box ....................................................................................................... 118 12.4.5.2. Particle Coupling ....................................................................................................... 118 12.4.5.3. Surface Tension Coefficient ........................................................................................ 118 12.4.5.4. Surface Tension Force Model ...................................................................................... 119 12.4.5.5. Interphase Transfer Model .......................................................................................... 119 12.4.5.5.1. Particle Model ................................................................................................... 119 12.4.5.5.2. Mixture Model .................................................................................................. 119 12.4.5.5.3. Free Surface Model ........................................................................................... 119 12.4.5.5.4. None ................................................................................................................ 119 12.4.5.6. Momentum Transfer .................................................................................................. 119 12.4.5.6.1. Drag Force ........................................................................................................ 119 12.4.5.6.2. Particle User Source ........................................................................................... 120 12.4.5.6.3. Lift Force ........................................................................................................... 120 12.4.5.6.4. Virtual Mass Force ............................................................................................. 120 12.4.5.6.5. Wall Lubrication Force ....................................................................................... 120 12.4.5.6.6. Turbulent Dispersion Force ................................................................................ 120 12.4.5.6.7. Pressure Gradient Force ..................................................................................... 120 12.4.5.7. Turbulence Transfer .................................................................................................... 121 12.4.5.8. Heat Transfer ............................................................................................................. 121 12.4.5.9. Mass Transfer ............................................................................................................. 121 12.4.5.10. Additional Variable Pairs ........................................................................................... 121 12.4.5.11. Component Pairs ..................................................................................................... 122 12.4.5.11.1. Eulerian Eulerian Pairs .................................................................................... 122 12.4.5.11.2. Continuous Particle Pairs ................................................................................ 122 12.4.5.12. Particle Breakup ....................................................................................................... 123 12.4.5.13. Particle Collision ...................................................................................................... 123 12.4.6. Solid Models Tab ................................................................................................................ 123
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ANSYS CFX-Pre User's Guide 12.4.6.1. Heat Transfer ............................................................................................................. 124 12.4.6.2. Thermal Radiation Model ........................................................................................... 124 12.4.6.3. Electromagnetic Model .............................................................................................. 124 12.4.6.4. Additional Variables Models ....................................................................................... 124 12.4.6.5. Solid Motion .............................................................................................................. 124 12.4.7. Porosity Settings Tab .......................................................................................................... 125 12.4.7.1. Area Porosity ............................................................................................................. 125 12.4.7.2. Volume Porosity ......................................................................................................... 125 12.4.7.3. Loss Models ............................................................................................................... 125 12.4.7.4. Contact Area Model ................................................................................................... 126 12.4.7.5. Fluid Solid Area Density ............................................................................................. 126 12.4.7.6. Fluid Solid Heat Transfer ............................................................................................. 127 12.4.7.7. Additional Variable Pair Details ................................................................................... 127 12.4.8. Particle Injection Regions Tab ............................................................................................. 127 12.4.8.1. Particle Injection Regions List Box .............................................................................. 127 12.4.8.2. [particle injection region name]: Fluid: List Box ........................................................... 127 12.4.8.3. [fluid name] Check Box .............................................................................................. 127 12.4.8.3.1. Injection Method .............................................................................................. 128 12.4.8.3.1.1. Settings for Cone Definition ...................................................................... 128 12.4.8.3.1.2. Settings for Particle Primary Breakup ......................................................... 129 12.4.9. Initialization Tab ................................................................................................................. 130 12.4.10. Solver Control Tab ............................................................................................................ 130 13. Domain Interfaces ............................................................................................................................. 131 13.1. Creating and Editing a Domain Interface ..................................................................................... 131 13.1.1. Domain Interface: Basic Settings Tab ................................................................................... 132 13.1.1.1. Interface Type ............................................................................................................ 132 13.1.1.2. Interface Side 1/2 ....................................................................................................... 132 13.1.1.2.1. Domain (Filter) .................................................................................................. 132 13.1.1.2.2. Region List ........................................................................................................ 132 13.1.1.3. Interface Models ........................................................................................................ 133 13.1.1.3.1. Interface Model Option: Translational Periodicity ................................................ 133 13.1.1.3.2. Interface Model Option: Rotational Periodicity ................................................... 133 13.1.1.3.3. Interface Model Option: General Connection ..................................................... 133 13.1.1.3.3.1. Frame Change/Mixing Model .................................................................... 133 13.1.1.3.3.1.1. Option ............................................................................................. 133 13.1.1.3.3.1.2. Frozen Rotor: Rotational Offset Check Box ........................................ 133 13.1.1.3.3.1.3. Stage: Pressure Profile Decay Check Box ........................................... 133 13.1.1.3.3.1.4. Stage: Constant Total Pressure Check Box ......................................... 134 13.1.1.3.3.2. Pitch Change Options ............................................................................... 134 13.1.1.3.3.2.1. Pitch Change: Value: Pitch Ratio ........................................................ 134 13.1.1.3.3.2.2. Pitch Change: Specified Pitch Angles: Pitch Angle Side 1/2 ................ 134 13.1.1.4. Mesh Connection Method .......................................................................................... 134 13.1.1.4.1. Mesh Connection: Option .................................................................................. 134 13.1.1.4.2. Intersection Control .......................................................................................... 134 13.1.1.4.2.1. Intersection Control: Option ...................................................................... 135 13.1.2. Domain Interface: Additional Interface Models Tab .............................................................. 136 13.1.2.1. Mass And Momentum ................................................................................................ 136 13.1.2.1.1. Conservative Interface Flux: Interface Models ..................................................... 137 13.1.2.1.1.1. None ........................................................................................................ 137 13.1.2.1.1.2. Mass Flow Rate ......................................................................................... 137 13.1.2.1.1.2.1. Pressure Update Multiplier ............................................................... 137 13.1.2.1.1.3. Pressure Change ....................................................................................... 137
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ANSYS CFX-Pre User's Guide 13.1.2.1.2. No Slip Wall ....................................................................................................... 137 13.1.2.1.2.1. No Slip Wall: Wall Velocity .......................................................................... 137 13.1.2.1.3. Free Slip Wall ..................................................................................................... 138 13.1.2.1.4. Side Dependent ................................................................................................ 138 13.1.2.2. Heat Transfer ............................................................................................................. 138 13.1.2.2.1. Conservative Interface Flux: Interface Model ...................................................... 138 13.1.2.2.1.1. None ........................................................................................................ 138 13.1.2.2.1.2. Interface Model Option: Thermal Contact Resistance ................................. 138 13.1.2.2.1.3. Interface Model Option: Thin Material ....................................................... 138 13.1.2.2.2. Side Dependent ................................................................................................ 138 13.1.2.3. Electric Field .............................................................................................................. 138 13.1.2.3.1. Conservative Interface Flux: Interface Model ...................................................... 139 13.1.2.3.1.1. None ........................................................................................................ 139 13.1.2.3.1.2. Interface Model Option: Electric Field Contact Resistance .......................... 139 13.1.2.3.2. Side Dependent ................................................................................................ 139 13.1.2.4. Additional Variable .................................................................................................... 139 13.1.2.4.1. Conservative Interface Flux: Interface Model ...................................................... 139 13.1.2.4.1.1. None ........................................................................................................ 139 13.1.2.4.1.2. Interface Model Option: Additional Variable Contact Resistance ................. 139 13.1.2.4.2. Side Dependent ................................................................................................ 139 13.1.3. Domain Interface: Solid Interface Models Tab ...................................................................... 139 13.1.3.1. Heat Transfer ............................................................................................................. 139 13.1.3.1.1. Conservative Interface Flux: Interface Model ...................................................... 140 13.1.3.1.1.1. None ........................................................................................................ 140 13.1.3.1.1.2. Interface Model Option: Thermal Contact Resistance ................................. 140 13.1.3.1.1.3. Interface Model Option: Thin Material ....................................................... 140 13.1.3.1.2. Side Dependent ................................................................................................ 140 13.1.3.2. Additional Variable .................................................................................................... 140 13.1.3.2.1. Conservative Interface Flux: Interface Model ...................................................... 140 13.1.3.2.1.1. None ........................................................................................................ 140 13.1.3.2.1.2. Interface Model Option: Additional Variable Contact Resistance ................. 140 13.1.3.2.2. Side Dependent ................................................................................................ 140 14. Boundary Conditions ........................................................................................................................ 141 14.1. Default Boundary Condition ........................................................................................................ 141 14.2. Creating and Editing a Boundary Condition ................................................................................. 142 14.2.1. Boundary Basic Settings Tab ............................................................................................... 142 14.2.1.1. Boundary Type .......................................................................................................... 143 14.2.1.2. Location .................................................................................................................... 143 14.2.1.3. Coord Frame .............................................................................................................. 143 14.2.1.4. Frame Type ................................................................................................................ 143 14.2.1.5. Profile Boundary Conditions ....................................................................................... 143 14.2.1.5.1. Use Profile Data ................................................................................................. 144 14.2.1.5.1.1. Initializing Profile Data .............................................................................. 144 14.2.1.5.1.2. Profile Boundary Setup ............................................................................. 144 14.2.2. Boundary Details Tab .......................................................................................................... 144 14.2.2.1. Boundary Details: Inlet ............................................................................................... 145 14.2.2.1.1. Flow Regime: Inlet ............................................................................................. 145 14.2.2.1.2. Mesh Motion: Inlet ............................................................................................ 145 14.2.2.2. Boundary Details: Outlet ............................................................................................ 145 14.2.2.2.1. Flow Regime: Outlet .......................................................................................... 145 14.2.2.2.2. Mass and Momentum: Outlet ............................................................................. 145 14.2.2.2.3. Pressure Averaging: Outlet ................................................................................. 145
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ANSYS CFX-Pre User's Guide 14.2.2.2.4. Thermal Radiation: Outlet .................................................................................. 145 14.2.2.2.5. Mesh Motion: Outlet .......................................................................................... 145 14.2.2.3. Boundary Details: Opening ........................................................................................ 146 14.2.2.3.1. Mass and Momentum: Opening ......................................................................... 146 14.2.2.3.2. Flow Direction: Opening .................................................................................... 146 14.2.2.3.3. Loss Coefficient: Opening .................................................................................. 146 14.2.2.3.4. Turbulence: Opening ......................................................................................... 146 14.2.2.3.5. Heat Transfer: Opening ...................................................................................... 146 14.2.2.3.6. Thermal Radiation: Opening .............................................................................. 146 14.2.2.3.7. Component Details: Opening ............................................................................ 146 14.2.2.3.8. Mesh Motion: Opening ...................................................................................... 146 14.2.2.4. Boundary Details: Wall ................................................................................................ 146 14.2.2.4.1. Mass And Momentum ....................................................................................... 146 14.2.2.4.1.1. Slip Model Settings ................................................................................... 147 14.2.2.4.1.2. Shear Stress Settings ................................................................................ 147 14.2.2.4.1.3. Wall Velocity Settings ................................................................................ 147 14.2.2.4.1.3.1. Axis Definition ................................................................................. 147 14.2.2.4.2. Wall Roughness ................................................................................................. 147 14.2.2.4.3. Solid Motion: Wall .............................................................................................. 147 14.2.2.4.4. Heat Transfer: Wall ............................................................................................. 148 14.2.2.4.5. Thermal Radiation: Wall ..................................................................................... 148 14.2.2.4.6. Mesh Motion: Wall ............................................................................................. 148 14.2.2.4.7. Additional Coupling Sent Data .......................................................................... 148 14.2.2.5. Boundary Details: Symmetry ...................................................................................... 148 14.2.2.6. Boundary Details: Interfaces ....................................................................................... 148 14.2.2.7. Mesh Motion ............................................................................................................. 148 14.2.3. Boundary Fluid Values Tab .................................................................................................. 149 14.2.3.1. Fluid Values: Turbulence ............................................................................................. 149 14.2.3.1.1. Intensity and Length Scale ................................................................................. 150 14.2.3.1.2. Intensity and Eddy Viscosity Ratio ...................................................................... 150 14.2.3.1.3. k and Epsilon .................................................................................................... 150 14.2.3.1.4. Intensity and Auto Compute Length .................................................................. 150 14.2.3.2. Fluid Values: Volume Fraction ..................................................................................... 150 14.2.3.3. Fluid Values: Heat Transfer .......................................................................................... 150 14.2.3.4. Fluid Values for Inlets and Openings ........................................................................... 150 14.2.3.4.1. Multiphase ........................................................................................................ 150 14.2.3.4.2. MUSIG settings ................................................................................................. 151 14.2.3.4.3. Particle Tracking Settings for Inlets and Openings .............................................. 151 14.2.3.4.3.1. Phase List ................................................................................................. 151 14.2.3.4.3.2. Particle Behavior ....................................................................................... 151 14.2.3.4.3.3. Mass and Momentum ............................................................................... 151 14.2.3.4.3.4. Particle Position ........................................................................................ 152 14.2.3.4.3.5. Particle Locations ..................................................................................... 152 14.2.3.4.3.6. Number of Positions ................................................................................. 152 14.2.3.4.3.7. Particle Mass Flow .................................................................................... 152 14.2.3.4.3.8. Particle Diameter Distribution ................................................................... 152 14.2.3.4.3.9. Heat Transfer ............................................................................................ 152 14.2.3.4.3.10. Component Details ................................................................................. 152 14.2.3.5. Fluid Values for Outlets .............................................................................................. 152 14.2.3.6. Fluid Values for Walls .................................................................................................. 152 14.2.3.6.1. Particle Tracking Settings for Walls ..................................................................... 152 14.2.3.6.2. Settings for Particle-Wall Interaction .................................................................. 153
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ANSYS CFX-Pre User's Guide 14.2.3.7. Fluid Values for Interfaces ........................................................................................... 153 14.2.3.7.1. Fluid-Solid Interface, Fluid Side .......................................................................... 153 14.2.3.7.2. Fluid-Fluid and Periodic Interfaces ..................................................................... 154 14.2.4. Boundary Solid Values Tab .................................................................................................. 154 14.2.4.1. Heat Transfer ............................................................................................................. 154 14.2.4.1.1. Adiabatic .......................................................................................................... 154 14.2.4.1.2. Fixed Temperature ............................................................................................ 154 14.2.4.1.3. Heat Flux .......................................................................................................... 154 14.2.4.1.4. Heat Transfer Coefficient ................................................................................... 154 14.2.4.1.5. Conservative Interface Flux ................................................................................ 154 14.2.4.2. Additional Variables ................................................................................................... 155 14.2.5. Boundary Sources Tab ........................................................................................................ 155 14.2.6. Boundary Plot Options Tab ................................................................................................. 155 14.2.6.1. Boundary Contour ..................................................................................................... 155 14.2.6.2. Boundary Vector ........................................................................................................ 155 14.3. Interface Boundary Conditions .................................................................................................... 155 14.4. Symmetry Boundary Conditions .................................................................................................. 156 14.5. Working with Boundary Conditions ............................................................................................. 156 14.5.1. Boundary Condition Visualization ....................................................................................... 156 14.5.2. Profile Data and CEL Functions ............................................................................................ 156 14.5.2.1. Types of Discrete Profiles ............................................................................................ 156 14.5.2.2. Profile Data Format .................................................................................................... 157 14.5.2.3. Multiphase Boundary Condition Example ................................................................... 158 15. Initialization ...................................................................................................................................... 159 15.1. Using the User Interface .............................................................................................................. 159 15.1.1. Domain: Initialization Tab .................................................................................................... 159 15.1.1.1. Domain Initialization .................................................................................................. 160 15.1.2. Global Settings and Fluid Settings Tabs ............................................................................... 160 15.1.2.1. Coord Frame Check Box ............................................................................................. 160 15.1.2.1.1. Coord Frame Check Box: Coord Frame ................................................................ 160 15.1.2.2. Frame Type Check Box ............................................................................................... 160 15.1.2.2.1. Frame Type ....................................................................................................... 160 15.1.2.3. Initial Conditions: Velocity Type .................................................................................. 160 15.1.2.4. Initial Conditions: Cartesian Velocity Components ....................................................... 161 15.1.2.4.1. Option .............................................................................................................. 161 15.1.2.4.2. Velocity Scale Check Box ................................................................................... 161 15.1.2.4.2.1. Velocity Scale Check Box: Value ................................................................. 161 15.1.2.4.3. U, V, W ............................................................................................................... 161 15.1.2.5. Initial Conditions: Cylindrical Velocity Components ..................................................... 161 15.1.2.5.1. Option .............................................................................................................. 161 15.1.2.5.2. Velocity Scale Check Box ................................................................................... 161 15.1.2.5.3. Axial Component, Radial Component, Theta Component .................................... 162 15.1.2.6. Initial Conditions: Static Pressure ................................................................................ 162 15.1.2.6.1. Option .............................................................................................................. 162 15.1.2.6.2. Relative Pressure ............................................................................................... 162 15.1.2.7. Initial Conditions: Turbulence ..................................................................................... 162 15.1.2.7.1. Fractional Intensity ............................................................................................ 163 15.1.2.7.2. Eddy Viscosity Ratio .......................................................................................... 163 15.1.2.7.3. Eddy Length Scale ............................................................................................. 163 15.1.2.7.4. Turbulence Kinetic Energy ................................................................................. 163 15.1.2.7.5. Turbulence Eddy Dissipation ............................................................................. 164 15.1.2.7.6. Turbulence Eddy Frequency .............................................................................. 164
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ANSYS CFX-Pre User's Guide 15.1.2.7.7. Reynolds Stress Components ............................................................................ 164 15.1.2.8. Initial Conditions: Temperature ................................................................................... 164 15.1.2.9. Initial Conditions: Radiation Intensity .......................................................................... 164 15.1.2.9.1. Option .............................................................................................................. 164 15.1.2.10. Initial Conditions: Mixture Fraction ........................................................................... 165 15.1.2.10.1. Option ............................................................................................................ 165 15.1.2.10.2. Mixture Fraction .............................................................................................. 165 15.1.2.11. Initial Conditions: Mixture Fraction Variance .............................................................. 165 15.1.2.11.1. Option ............................................................................................................ 165 15.1.2.11.2. Mix. Fracn. Variance .......................................................................................... 165 15.1.2.12. Initial Conditions: Component Details ....................................................................... 165 15.1.2.12.1. List Box ........................................................................................................... 166 15.1.2.12.2. [component name]: Option ............................................................................. 166 15.1.2.12.3. [component name]: Mass Fraction ................................................................... 166 15.1.2.13. Initial Conditions: Additional Variable Details ............................................................ 166 15.1.2.14. Fluid Specific Initialization ........................................................................................ 166 15.1.2.15. Fluid Specific Initialization: List Box ........................................................................... 166 15.1.2.16. Fluid Specific Initialization: [fluid name] Check Box .................................................... 166 15.1.2.17. Fluid Specific Initialization: [fluid name] Check Box: Initial Conditions ........................ 166 15.1.2.17.1. Velocity Type ................................................................................................... 166 15.1.2.17.2. Volume Fraction: Option .................................................................................. 167 15.1.2.17.3. Volume Fraction: Volume Fraction .................................................................... 167 15.1.2.18. Solid Specific Initialization ........................................................................................ 167 15.1.2.19. Solid Specific Initialization: List Box ........................................................................... 167 15.1.2.20. Solid Specific Initialization: [solid name] Check Box ................................................... 167 16. Source Points ..................................................................................................................................... 169 16.1. Basic Settings Tab ........................................................................................................................ 169 16.2. Sources Tab ................................................................................................................................. 169 16.2.1. Single-Phase Fluid Sources ................................................................................................. 169 16.2.1.1. Component Mass Fractions ........................................................................................ 170 16.2.1.2. Additional Variables ................................................................................................... 170 16.2.1.3. Continuity ................................................................................................................. 170 16.2.1.3.1. Continuity Option ............................................................................................. 170 16.2.1.3.2. Additional Variables .......................................................................................... 170 16.2.1.3.3. Component Mass Fractions ............................................................................... 170 16.2.1.3.4. Temperature ..................................................................................................... 170 16.2.1.3.5. Velocity ............................................................................................................. 170 16.2.1.4. Energy ....................................................................................................................... 171 16.2.1.5. Turbulence Eddy Dissipation or Turbulence Kinetic Energy .......................................... 171 16.2.2. Multiphase Bulk Sources ..................................................................................................... 171 16.2.3. Multiplying Sources by Porosity .......................................................................................... 171 16.3. Fluid Sources Tab ........................................................................................................................ 171 16.4. Sources in Solid Domains ............................................................................................................ 171 16.5. Source Points and Mesh Deformation .......................................................................................... 172 17. Subdomains ...................................................................................................................................... 173 17.1. Creating New Subdomains .......................................................................................................... 173 17.2. The Subdomains Tab ................................................................................................................... 174 17.3. Basic Settings Tab ........................................................................................................................ 174 17.3.1. Location ............................................................................................................................. 174 17.3.2. Coordinate Frame ............................................................................................................... 174 17.4. Sources Tab ................................................................................................................................. 174 17.4.1. Single-Phase Fluid Sources ................................................................................................. 174
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ANSYS CFX-Pre User's Guide 17.4.1.1. Momentum Source/Porous Loss ................................................................................. 175 17.4.1.2. Equation Sources ....................................................................................................... 175 17.4.1.2.1. Component Mass Fractions ............................................................................... 175 17.4.1.2.2. Additional Variables .......................................................................................... 175 17.4.1.2.3. Continuity ......................................................................................................... 176 17.4.1.2.4. Turbulence Quantities ....................................................................................... 176 17.4.1.2.5. Energy .............................................................................................................. 176 17.4.2. Bulk Sources for Multiphase Simulations ............................................................................. 177 17.4.3. Multiplying Sources by Porosity .......................................................................................... 177 17.5. Fluids Tab .................................................................................................................................... 177 17.5.1. Particle Absorption ............................................................................................................. 177 17.6. Mesh Motion .............................................................................................................................. 177 18. Rigid Bodies ...................................................................................................................................... 179 18.1. Rigid Body User Interface ............................................................................................................ 179 18.1.1. Insert Rigid Body Dialog Box ............................................................................................... 179 18.1.2. Basic Settings Tab ............................................................................................................... 180 18.1.2.1. Mass .......................................................................................................................... 180 18.1.2.2. Location .................................................................................................................... 180 18.1.2.3. Coord Frame .............................................................................................................. 180 18.1.2.4. Mass Moment of Inertia ............................................................................................. 180 18.1.3. Dynamics Tab ..................................................................................................................... 181 18.1.3.1. External Force Definitions .......................................................................................... 181 18.1.3.2. External Torque Definitions ........................................................................................ 182 18.1.3.3. Degrees of Freedom .................................................................................................. 183 18.1.3.3.1. Translational Degrees of Freedom ...................................................................... 183 18.1.3.3.2. Rotational Degrees of Freedom ......................................................................... 183 18.1.3.4. Gravity ...................................................................................................................... 183 18.1.4. Initial Conditions Tab .......................................................................................................... 183 18.1.4.1. Center of Mass ........................................................................................................... 183 18.1.4.2. Linear Velocity ........................................................................................................... 184 18.1.4.3. Angular Velocity ........................................................................................................ 184 18.1.4.4. Linear Acceleration .................................................................................................... 184 18.1.4.5. Angular Acceleration ................................................................................................. 184 19. Units and Dimensions ....................................................................................................................... 185 19.1. Units Syntax ................................................................................................................................ 185 19.2. Using Units in CFX-Pre ................................................................................................................. 186 19.2.1. CFX Commonly Used Units ................................................................................................. 186 19.2.2. Defining Your Own Units .................................................................................................... 187 19.3. Solution Units ............................................................................................................................. 187 20. Solver Control .................................................................................................................................... 189 20.1. Basic Settings Tab ........................................................................................................................ 189 20.1.1. Basic Settings: Common ..................................................................................................... 189 20.1.1.1. Advection Scheme ..................................................................................................... 189 20.1.1.2. Turbulence Numerics ................................................................................................. 189 20.1.1.3. Convergence Criteria ................................................................................................. 190 20.1.1.4. Elapsed Wall Clock Time Control ................................................................................. 190 20.1.1.5. Interrupt Control ........................................................................................................ 190 20.1.1.5.1. List Box ............................................................................................................. 190 20.1.1.5.1.1. [Interrupt Condition Name] ....................................................................... 190 20.1.1.6. Junction Box Routine ................................................................................................. 190 20.1.2. Basic Settings for Steady State Simulations .......................................................................... 191 20.1.2.1. Convergence Control: Min. Iterations .......................................................................... 191
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ANSYS CFX-Pre User's Guide 20.1.2.2. Convergence Control: Max. Iterations .......................................................................... 191 20.1.2.3. Convergence Control: Fluid Timescale Control ............................................................ 191 20.1.2.4. Solid Timescale Control .............................................................................................. 191 20.1.3. Basic Settings for Transient Simulations ............................................................................... 191 20.1.3.1. Transient Scheme ...................................................................................................... 191 20.1.3.2. Convergence Control ................................................................................................. 191 20.1.3.2.1. Min. Coeff. Loops ............................................................................................... 191 20.1.3.2.2. Max. Coeff. Loops ............................................................................................... 192 20.1.3.2.3. Fluid Timescale Control ..................................................................................... 192 20.1.4. Immersed Solid Control ...................................................................................................... 192 20.2. Equation Class Settings Tab ......................................................................................................... 192 20.3. External Coupling Tab ................................................................................................................. 193 20.4. Particle Control Tab ..................................................................................................................... 193 20.5. Rigid Body Control Tab ................................................................................................................ 193 20.6. Advanced Options Tab ................................................................................................................ 196 21. Output Control .................................................................................................................................. 201 21.1. User Interface ............................................................................................................................. 201 21.1.1. Results Tab ......................................................................................................................... 201 21.1.1.1. Option ....................................................................................................................... 201 21.1.1.2. File Compression ....................................................................................................... 202 21.1.1.3. Output Variable List ................................................................................................... 202 21.1.1.4. Output Equation Residuals Check Box ........................................................................ 202 21.1.1.5. Output Boundary Flows Check Box ............................................................................. 202 21.1.1.6. Output Variable Operators Check Box ......................................................................... 202 21.1.1.7. Extra Output Variables List ......................................................................................... 202 21.1.1.8. Output Particle Boundary Vertex Fields Check Box ...................................................... 202 21.1.2. Backup Tab ......................................................................................................................... 202 21.1.2.1. List Box ...................................................................................................................... 202 21.1.2.2. [Backup Results Name] ............................................................................................... 202 21.1.2.2.1. Option .............................................................................................................. 202 21.1.2.2.2. File Compression ............................................................................................... 203 21.1.2.2.3. Output Variables List ......................................................................................... 203 21.1.2.2.4. Output Equation Residuals Check Box ............................................................... 203 21.1.2.2.5. Output Boundary Flows Check Box .................................................................... 203 21.1.2.2.6. Output Variable Operators Check Box ................................................................ 203 21.1.2.2.7. Extra Output Variables List ................................................................................. 203 21.1.2.2.8. Output Particle Boundary Vertex Fields Check Box ............................................. 203 21.1.2.2.9. Include Tracks of One-way Coupled Particles Check Box ..................................... 203 21.1.2.2.10. Output Frequency: Option ............................................................................... 203 21.1.3. Transient Results Tab .......................................................................................................... 203 21.1.3.1. List Box ...................................................................................................................... 203 21.1.3.2. [Transient Results Name] ............................................................................................ 204 21.1.3.2.1. Option .............................................................................................................. 204 21.1.3.2.2. File Compression ............................................................................................... 204 21.1.3.2.3. Output Variables List ......................................................................................... 204 21.1.3.2.4. Include Mesh .................................................................................................... 204 21.1.3.2.5. Output Equation Residuals Check Box ............................................................... 204 21.1.3.2.6. Output Boundary Flows Check Box .................................................................... 204 21.1.3.2.7. Output Variable Operators Check Box ................................................................ 204 21.1.3.2.8. Extra Output Variables List ................................................................................. 204 21.1.3.2.9. Output Particle Boundary Vertex Fields Check Box ............................................. 204 21.1.3.2.10. Output Frequency ........................................................................................... 204
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ANSYS CFX-Pre User's Guide 21.1.4. Transient Statistics Tab ........................................................................................................ 204 21.1.4.1. List Box ...................................................................................................................... 205 21.1.4.2. [Transient Statistics Name] ......................................................................................... 205 21.1.4.2.1. Option .............................................................................................................. 205 21.1.4.2.2. Output Variables List ......................................................................................... 205 21.1.4.2.3. Start Iteration List Check Box ............................................................................. 205 21.1.4.2.3.1. Start Iteration List Check Box: Start Iteration List ........................................ 205 21.1.4.2.4. Stop Iteration List Check Box ............................................................................. 206 21.1.4.2.4.1. Stop Iteration List Check Box: Stop Iteration List ........................................ 206 21.1.5. Monitor Tab ........................................................................................................................ 206 21.1.5.1. Monitor Options Check Box ........................................................................................ 206 21.1.5.1.1. Monitor Coeff. Loop Convergence ...................................................................... 206 21.1.5.1.2. Monitor Balances: Option .................................................................................. 206 21.1.5.1.3. Monitor Forces: Option ...................................................................................... 207 21.1.5.1.4. Monitor Residuals: Option ................................................................................. 207 21.1.5.1.5. Monitor Totals: Option ....................................................................................... 207 21.1.5.1.6. Monitor Particles: Option ................................................................................... 207 21.1.5.1.7. Efficiency Output Check Box .............................................................................. 207 21.1.5.1.7.1. Inflow Boundary ....................................................................................... 207 21.1.5.1.7.2. Outflow Boundary .................................................................................... 207 21.1.5.1.7.3. Efficiency Type .......................................................................................... 208 21.1.5.1.7.4. Efficiency Calculation Method ................................................................... 208 21.1.5.1.8. Monitor Points And Expressions List Box ............................................................ 208 21.1.5.1.8.1. Monitor Points and Expressions: [Monitor Name]: Option ........................... 208 21.1.5.1.8.2. Monitor Points and Expressions: [Monitor Name]: Output Variables List ...... 208 21.1.5.1.8.3. Monitor Points and Expressions: [Monitor Name]: Cartesian Coordinates .... 208 21.1.5.1.8.4. Monitor Points and Expressions: [Monitor Name]: Expression Value ............ 209 21.1.5.1.8.5. Monitor Points and Expressions: [Monitor Name]: Coord Frame Check Box ............................................................................................................................. 209 21.1.5.1.8.6. Monitor Points and Expressions: [Monitor Name]: Coord Frame Check Box: Coord Frame ............................................................................................................... 209 21.1.5.1.8.7. Monitor Points and Expressions: [Monitor Name]: Domain Name Check Box ............................................................................................................................. 209 21.1.5.1.8.8. Monitor Points and Expressions: [Monitor Name]: Domain Name Check Box: Domain Name ............................................................................................................ 209 21.1.5.1.9. Radiometer: Frame Overview ............................................................................. 209 21.1.5.1.10. Radiometer: List Box ........................................................................................ 209 21.1.5.1.10.1. Radiometer: [Radiometer Name]: Option ................................................. 209 21.1.5.1.10.2. Radiometer: [Radiometer Name]: Cartesian Coordinates .......................... 209 21.1.5.1.10.3. Radiometer: [Radiometer Name]: Temperature ......................................... 210 21.1.5.1.10.4. Radiometer: [Radiometer Name]: Quadrature Points ................................ 210 21.1.5.1.10.5. Radiometer: [Radiometer Name]: Coord Frame Check Box ........................ 210 21.1.5.1.10.6. Radiometer: [Radiometer Name]: Coord Frame Check Box: Coord Frame ......................................................................................................................... 210 21.1.5.1.10.7. Radiometer: [Radiometer Name]: Diagnostic Output Level Check Box ...... 210 21.1.5.1.10.8. Radiometer: [Radiometer Name]: Diagnostic Output Level Check Box: Diagnostic Output Level .................................................................................................. 210 21.1.5.1.10.9. Radiometer: [Radiometer Name]: Direction: Option .................................. 210 21.1.5.1.10.10. Radiometer: [Radiometer Name]: Direction: X Component,Y Component, Z Component ............................................................................................................. 210 21.1.6. Particles Tab ....................................................................................................................... 210 21.1.6.1. Particle Track File Check Box ....................................................................................... 211
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ANSYS CFX-Pre User's Guide 21.1.6.1.1. Option .............................................................................................................. 211 21.1.6.1.2. Track Positions Check Box .................................................................................. 211 21.1.6.1.3. Track Positions Check Box: Track Positions .......................................................... 211 21.1.6.1.4. Interval ............................................................................................................. 212 21.1.6.1.5. Track Distance Spacing ...................................................................................... 212 21.1.6.1.6. Track Time Spacing ............................................................................................ 212 21.1.6.1.7. Track Printing Interval Check Box ....................................................................... 212 21.1.6.1.8. Track Printing Interval Check Box: Interval .......................................................... 212 21.1.6.1.9. Keep Track File Check Box .................................................................................. 212 21.1.6.1.10. Track File Format Check Box ............................................................................. 212 21.1.6.1.11. Track File Format Check Box: Track File Format .................................................. 212 21.1.6.2. Transient Particle Diagnostics ..................................................................................... 213 21.1.6.3. Transient Particle Diagnostics: List Box ........................................................................ 213 21.1.6.4. Transient Particle Diagnostics: [Transient Particle Diagnostics Name] ........................... 213 21.1.6.4.1. Option .............................................................................................................. 213 21.1.6.4.2. Particles List ...................................................................................................... 213 21.1.6.4.3. Spray Mass Frac. ................................................................................................ 214 21.1.6.4.4. Penetration Origin and Direction: Option ........................................................... 214 21.1.6.4.5. Penetration Origin and Direction: Injection Center ............................................. 214 21.1.6.4.6. Penetration Origin and Direction: Injection Direction ......................................... 214 21.1.6.4.6.1. Option ..................................................................................................... 214 21.1.6.4.7. Axial Penetration: Option ................................................................................... 214 21.1.6.4.8. Radial Penetration: Option ................................................................................. 214 21.1.6.4.9. Normal Penetration: Option ............................................................................... 214 21.1.6.4.10. Spray Angle: Option ......................................................................................... 214 21.1.6.4.10.1. Spray Angle: Spray Radius at Penetration Origin Check Box ...................... 215 21.1.6.4.10.2. Spray Angle: Spray Radius at Penetration Origin Check Box: Spray Radius ............................................................................................................................... 215 21.1.7. Export Results Tab .............................................................................................................. 215 21.1.7.1. List Box ...................................................................................................................... 215 21.1.7.2. [Export Name]: Export Format .................................................................................... 215 21.1.7.2.1. Filename Prefix Check Box ................................................................................. 215 21.1.7.2.2. Filename Prefix Check Box: Filename Prefix ........................................................ 215 21.1.7.3. [Export Name]: Export Frequency ............................................................................... 215 21.1.7.3.1. Option .............................................................................................................. 215 21.1.7.4. [Export Name]: Export Surface .................................................................................... 216 21.1.7.4.1. List Box ............................................................................................................. 216 21.1.7.4.2. [Export Surface Name]: Option .......................................................................... 216 21.1.7.4.3. [Export Surface Name]: Output Boundary List .................................................... 216 21.1.7.4.4. [Export Surface Name]: Output Variables List ...................................................... 216 21.1.7.4.5. [Export Surface Name]: Output Nodal Area Vectors Check Box ............................ 216 21.1.8. Common Settings .............................................................................................................. 216 21.1.8.1. Option ....................................................................................................................... 216 21.1.8.2. File Compression ....................................................................................................... 217 21.1.8.3. Output Variables List .................................................................................................. 217 21.1.8.4. Output Equation Residuals Check Box ........................................................................ 217 21.1.8.5. Output Boundary Flows Check Box ............................................................................. 217 21.1.8.6. Output Variable Operators Check Box ......................................................................... 218 21.1.8.7. Output Particle Boundary Vertex Fields Check Box ...................................................... 218 21.1.8.8. Output Frequency Options ........................................................................................ 218 21.1.8.8.1. Timestep Interval .............................................................................................. 218 21.1.8.8.2. Timestep List ..................................................................................................... 218
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ANSYS CFX-Pre User's Guide 21.1.8.8.3. Time Interval ..................................................................................................... 219 21.1.8.8.4. Time List ........................................................................................................... 219 21.1.8.8.5. Every Timestep .................................................................................................. 219 21.1.8.8.6. Every Iteration ................................................................................................... 219 21.1.8.8.7. Iteration Interval ............................................................................................... 219 21.1.8.8.8. Iteration List ...................................................................................................... 219 21.1.8.8.9. Wall Clock Time Interval ..................................................................................... 219 21.1.8.8.10. Coupling Step Interval ..................................................................................... 219 21.1.8.8.11. Every Coupling Step ........................................................................................ 219 21.1.8.8.12. None ............................................................................................................... 220 21.2. Working with Output Control ...................................................................................................... 220 21.2.1. Working with Transient Statistics ......................................................................................... 220 21.2.1.1. Statistic Initialization and Accumulation ..................................................................... 220 21.2.1.2. Statistics as Variable Operators ................................................................................... 220 21.2.1.3. Using Statistics with Transient Rotor-Stator Cases ....................................................... 221 21.2.2. Working with Monitors ....................................................................................................... 221 21.2.2.1. Setting up Monitors ................................................................................................... 221 21.2.2.2. Transient/ Mesh Deformation Runs ............................................................................. 222 21.2.2.3. Output Information ................................................................................................... 222 21.2.2.4. Expression ................................................................................................................. 222 21.2.2.5. Viewing Monitor Values during a Run ......................................................................... 223 21.2.2.6. Viewing Monitor Point Values after a Run .................................................................... 223 21.2.3. Working with Export Results ............................................................................................... 223 21.2.3.1. File Naming Conventions ........................................................................................... 223 21.2.3.2. Propagating Older Time Step Values ........................................................................... 224 21.2.3.3. Output Boundary List and Output Region Naming ...................................................... 224 21.2.3.4. Output Variables List .................................................................................................. 224 22. Mesh Adaption .................................................................................................................................. 225 22.1. Overview .................................................................................................................................... 225 22.2. Setting Up Mesh Adaption .......................................................................................................... 226 22.3. The Details View for Mesh Adaption ............................................................................................. 227 22.3.1. Basic Settings Tab ............................................................................................................... 228 22.3.1.1. Region List ................................................................................................................. 228 22.3.1.2. Save Intermediate Files .............................................................................................. 228 22.3.1.3. Adaption Criteria ....................................................................................................... 228 22.3.1.3.1. Variables List ..................................................................................................... 228 22.3.1.3.2. Max. Num. Steps ................................................................................................ 228 22.3.1.3.3. Option .............................................................................................................. 229 22.3.1.4. Adaption Method ...................................................................................................... 229 22.3.1.4.1. Option .............................................................................................................. 229 22.3.1.4.2. Minimum Edge Length ...................................................................................... 229 22.3.1.5. Adaption Convergence Criteria .................................................................................. 229 22.3.2. Advanced Options Tab ........................................................................................................ 229 22.3.2.1. Node Alloc. Param. ..................................................................................................... 230 22.3.2.2. Number of Levels ....................................................................................................... 230 22.4. Advanced Topic: Adaption with 2D Meshes .................................................................................. 230 23. Expert Control Parameters ................................................................................................................ 231 23.1. Modifying Expert Control Parameters .......................................................................................... 231 24. Coordinate Frames ............................................................................................................................ 233 24.1. Creating a New Coordinate Frame ............................................................................................... 233 24.2. Coordinate Frame Basic Settings Tab ........................................................................................... 233 24.2.1. Coordinate Frame: Option ................................................................................................... 234
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ANSYS CFX-Pre User's Guide 24.2.1.1. Point and Normal ....................................................................................................... 234 24.2.1.2. Axis Points ................................................................................................................. 234 24.2.2. Coordinate Frame: Centroid ................................................................................................ 234 24.2.2.1. Location .................................................................................................................... 234 24.2.2.2. Centroid Type ............................................................................................................ 234 24.2.3. Coordinate Frame: Direction ............................................................................................... 235 24.2.3.1. Invert Normal Axis Direction Check Box ...................................................................... 235 24.2.3.2. Point on Reference Plane 1-3 Check Box ..................................................................... 235 24.2.3.3. Point on Reference Plane 1-3 Check Box: Coordinate ................................................... 235 24.2.4. Coord Frame Type .............................................................................................................. 235 24.2.5. Reference Coord Frame ...................................................................................................... 235 24.2.6. Origin ................................................................................................................................ 235 24.2.7. Z-Axis Point ........................................................................................................................ 236 24.2.8. X-Z Plane Point ................................................................................................................... 236 24.2.9. Visibility Check Box ............................................................................................................. 236 25. Materials and Reactions .................................................................................................................... 237 25.1. Materials ..................................................................................................................................... 237 25.1.1. Library Materials ................................................................................................................. 237 25.1.2. Material Details View: Common Settings ............................................................................. 238 25.1.2.1. Option ....................................................................................................................... 238 25.1.2.2. Material Group .......................................................................................................... 238 25.1.2.2.1. User .................................................................................................................. 238 25.1.2.2.2. Air Data ............................................................................................................ 239 25.1.2.2.3. CHT Solids ......................................................................................................... 239 25.1.2.2.4. Calorically Perfect Ideal Gases ............................................................................ 239 25.1.2.2.5. Constant Property Gases / Liquids ..................................................................... 239 25.1.2.2.6. Dry/Wet Redlich Kwong .................................................................................... 239 25.1.2.2.7. Dry/Wet Redlich Kwong RGP ............................................................................. 239 25.1.2.2.8. Dry/Wet Peng Robinson RGP ............................................................................. 239 25.1.2.2.9. Dry/Wet Soave Redlich Kwong RGP ................................................................... 240 25.1.2.2.10. Dry/Wet Steam ................................................................................................ 240 25.1.2.2.11. Gas Phase Combustion .................................................................................... 240 25.1.2.2.12. Interphase Mass Transfer ................................................................................. 240 25.1.2.2.13. Particle Solids .................................................................................................. 240 25.1.2.2.14. Soot ................................................................................................................ 240 25.1.2.2.15. Water Data ...................................................................................................... 240 25.1.2.3. Material Description .................................................................................................. 240 25.1.2.4. Thermodynamic State ................................................................................................ 240 25.1.2.5. Coord Frame .............................................................................................................. 241 25.1.3. Material Details View: Pure Substance ................................................................................. 241 25.1.3.1. Basic Settings Tab ...................................................................................................... 241 25.1.3.2. Material Properties Tab .............................................................................................. 241 25.1.3.2.1. General Material ................................................................................................ 241 25.1.3.2.1.1. Equation of State - Value ........................................................................... 242 25.1.3.2.1.2. Equation of State - Ideal Gas ..................................................................... 242 25.1.3.2.1.3. Equation of State - Real Gas ...................................................................... 242 25.1.3.2.2. Table ................................................................................................................. 243 25.1.3.2.3. Table Generation ............................................................................................... 243 25.1.3.2.3.1. Minimum and Maximum Temperature ...................................................... 243 25.1.3.2.3.2. Minimum and Maximum Absolute Pressure .............................................. 243 25.1.3.2.3.3. Error Tolerance ......................................................................................... 244 25.1.3.2.3.4. Maximum Points ...................................................................................... 244
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ANSYS CFX-Pre User's Guide 25.1.3.2.3.5. Pressure/Temperature Extrapolation ......................................................... 244 25.1.4. Material Details View: Fixed Composition Mixture ................................................................ 244 25.1.4.1. Basic Settings Tab ...................................................................................................... 244 25.1.4.2. Mixture Properties Tab ............................................................................................... 245 25.1.5. Material Details View: Variable Composition Mixture ............................................................ 245 25.1.5.1. Basic Settings Tab ...................................................................................................... 245 25.1.5.2. Mixture Properties Tab ............................................................................................... 245 25.1.6. Material Details View: Homogeneous Binary Mixture ........................................................... 245 25.1.6.1. Basic Settings Tab ...................................................................................................... 246 25.1.6.2. Saturation Properties Tab ........................................................................................... 246 25.1.6.2.1. General ............................................................................................................. 246 25.1.6.2.2. Table ................................................................................................................. 246 25.1.6.2.3. Real Gas ............................................................................................................ 246 25.1.6.2.4. Table Generation ............................................................................................... 246 25.1.7. Material Details View: Reacting Mixture ............................................................................... 246 25.1.7.1. Basic Settings Tab ...................................................................................................... 246 25.1.7.2. Mixture Properties Tab ............................................................................................... 247 25.1.8. Material Details View: Hydrocarbon Fuel .............................................................................. 247 25.1.8.1. Basic Settings Tab ...................................................................................................... 247 25.1.8.2. Proximate/ Ultimate Analysis Tab ................................................................................ 247 25.1.8.3. Mixture Materials Tab ................................................................................................. 247 25.2. Reactions .................................................................................................................................... 248 25.2.1. Basic Settings Tab ............................................................................................................... 248 25.2.2. Single Step ......................................................................................................................... 248 25.2.2.1. Single Step: Basic Settings .......................................................................................... 248 25.2.2.2. Single Step: Reactants ................................................................................................ 249 25.2.2.3. Single Step: Products ................................................................................................. 249 25.2.2.4. Single Step: Reaction Rates ......................................................................................... 249 25.2.3. Multiple Step ...................................................................................................................... 249 25.2.4. Flamelet Library ................................................................................................................. 250 25.2.5. Multiphase ......................................................................................................................... 250 25.2.5.1. Multiphase: Basic Settings .......................................................................................... 250 25.2.5.2. Multiphase: Reactants ................................................................................................ 250 25.2.5.3. Multiphase: Products ................................................................................................. 250 25.2.5.4. Multiphase: Multiphase Reactions .............................................................................. 251 26. Additional Variables .......................................................................................................................... 253 26.1. User Interface ............................................................................................................................. 253 26.1.1. Insert Additional Variable Dialog Box .................................................................................. 253 26.1.2. Basic Settings Tab for Additional Variable Objects ................................................................ 253 26.1.2.1. Variable Type ............................................................................................................. 253 26.1.2.2. Units ......................................................................................................................... 254 26.1.2.3. Tensor Type ............................................................................................................... 254 26.1.3. Fluid Models and Fluid Specific Models Tabs for Domain Objects ......................................... 254 26.1.3.1. Additional Variable Details: List Box ............................................................................ 254 26.1.3.2. Additional Variable Details: [Additional Variable Name] Check Box ............................... 254 26.1.3.2.1. Option .............................................................................................................. 254 26.1.3.2.1.1. Transport Equation ................................................................................... 254 26.1.3.2.1.2. Diffusive Transport Equation ..................................................................... 254 26.1.3.2.1.3. Homogeneous Transport Equation ............................................................ 255 26.1.3.2.1.4. Homogeneous Diffusive Transport Equation ............................................. 255 26.1.3.2.1.5. Poisson Equation ...................................................................................... 255 26.1.3.2.1.6. Homogeneous Poisson Equation .............................................................. 255
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ANSYS CFX-Pre User's Guide 26.1.3.2.1.7. Fluid Dependent ...................................................................................... 255 26.1.3.2.1.8. Algebraic Equation ................................................................................... 255 26.1.3.2.1.9. Vector Algebraic Equation ......................................................................... 255 26.1.3.2.2. Value ................................................................................................................ 255 26.1.3.2.3. Kinematic Diffusivity Check Box ......................................................................... 256 26.1.3.2.4. Kinematic Diffusivity Check Box: Kinematic Diffusivity ........................................ 256 26.1.3.2.5. AV Properties for Fluid: Frame Overview ............................................................. 256 26.1.3.2.6. AV Properties for Fluid: List Box .......................................................................... 256 26.1.3.2.7. AV Properties for Fluid: [Fluid Name] Check Box .................................................. 256 26.1.3.2.8. AV Properties for Fluid: [Fluid Name] Check Box: Kinematic Diffusivity ................. 256 26.1.3.2.9. Vector xValue, Vector yValue, and Vector zValue .................................................. 257 26.1.4. Boundary Details and Fluid Values Tabs for Boundary Condition Objects .............................. 257 26.1.4.1. Additional Variables: List Box ...................................................................................... 257 26.1.4.2. Additional Variables: [Name] ....................................................................................... 257 26.1.4.2.1. Option .............................................................................................................. 257 26.1.4.2.2. Value ................................................................................................................ 258 26.1.4.2.3. Flux .................................................................................................................. 258 26.1.4.2.4. Transfer Coefficient ........................................................................................... 258 26.2. Creating an Additional Variable ................................................................................................... 258 27. Expressions ....................................................................................................................................... 259 27.1. Expressions Workspace ............................................................................................................... 259 27.1.1. Definition ........................................................................................................................... 260 27.1.2. Plot .................................................................................................................................... 260 27.1.3. Evaluate ............................................................................................................................. 261 27.2. Creating an Expression ................................................................................................................ 261 27.3. Modifying an Expression ............................................................................................................. 262 27.4. Importing or Exporting an Expression .......................................................................................... 262 27.4.1. Importing CCL Expressions ................................................................................................. 262 27.4.2. Exporting CCL Expressions .................................................................................................. 262 28. User Functions ................................................................................................................................... 263 28.1. Interpolation Function ................................................................................................................ 263 28.1.1. One Dimensional Interpolation ........................................................................................... 263 28.1.1.1. Extended Minimum and Maximum ............................................................................ 264 28.1.2. Three Dimensional Interpolation ......................................................................................... 264 28.1.3. Importing Data from a File .................................................................................................. 265 28.1.4. Viewing and Editing Data Imported from a File .................................................................... 265 28.2. User Defined Function ................................................................................................................. 266 28.2.1. Function Name ................................................................................................................... 266 28.2.1.1. Defining Quantities with User CEL Functions .............................................................. 266 28.2.2. Argument Units .................................................................................................................. 266 28.2.3. Result Units ........................................................................................................................ 267 29. User Routines .................................................................................................................................... 269 29.1. User CEL Routines ....................................................................................................................... 269 29.1.1. Calling Name ...................................................................................................................... 270 29.1.2. Library Name and Library Path ............................................................................................ 270 29.2. Junction Box Routines ................................................................................................................. 271 29.3. Particle User Routines .................................................................................................................. 271 30. Simulation Control ............................................................................................................................ 273 31. Execution and Termination Control .................................................................................................. 275 31.1. Execution Control ....................................................................................................................... 275 31.1.1. Overview of Defining CFX-Solver Startup ............................................................................ 275 31.1.2. The Details View for Execution Control ................................................................................ 275
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ANSYS CFX-Pre User's Guide 31.1.2.1. Solver Input File Name ............................................................................................... 276 31.1.2.2. Run Definition Tab ..................................................................................................... 276 31.1.2.2.1. Parallel Environment ......................................................................................... 277 31.1.2.2.2. Mesh Node Reordering ..................................................................................... 277 31.1.2.2.3. Optional Quitting CFX-Pre ................................................................................. 277 31.1.2.3. Partitioner Tab ........................................................................................................... 277 31.1.2.3.1. Partitioning Weighting ...................................................................................... 279 31.1.2.3.1.1. Uniform .................................................................................................... 279 31.1.2.3.1.2. Specified .................................................................................................. 279 31.1.2.3.1.3. Automatic ................................................................................................ 279 31.1.2.4. Solver Tab .................................................................................................................. 280 31.1.2.5. Interpolator Tab ......................................................................................................... 280 31.2. Termination Control .................................................................................................................... 280 31.2.1. Overview of Configuration Termination ............................................................................... 280 31.2.2. Details View for Termination Control ................................................................................... 281 32. Configurations .................................................................................................................................. 283 32.1. Overview of Defining a Configuration .......................................................................................... 283 32.2. The Details View for Configuration ............................................................................................... 284 32.2.1. General Settings Tab ........................................................................................................... 284 32.2.2. Remeshing Tab ................................................................................................................... 284 32.2.2.1. User Defined Remeshing ............................................................................................ 286 32.2.2.2. ANSYS ICEM CFD Replay Remeshing ........................................................................... 287 32.2.2.2.1. ICEM CFD Geometry Control .............................................................................. 287 32.2.2.2.2. ICEM CFD Mesh Control ..................................................................................... 287 32.2.2.2.3. Scalar Parameter ............................................................................................... 288 32.2.3. Run Definition Tab .............................................................................................................. 288 32.2.3.1. Parallel Environment .................................................................................................. 289 32.2.4. Partitioner Tab .................................................................................................................... 290 32.2.4.1. Partitioning Weighting ............................................................................................... 291 32.2.4.1.1. Uniform ............................................................................................................ 291 32.2.4.1.2. Specified ........................................................................................................... 291 32.2.4.1.3. Automatic ......................................................................................................... 292 32.2.5. Solver Tab .......................................................................................................................... 292 32.2.6. Interpolator Tab .................................................................................................................. 292 33. Quick Setup Mode ............................................................................................................................. 295 33.1. Starting a New Case in Quick Setup Mode .................................................................................... 295 33.2. Simulation Definition Tab ............................................................................................................ 295 33.2.1. Simulation Data .................................................................................................................. 295 33.2.1.1. Problem Type ............................................................................................................ 296 33.2.2. Working Fluid ..................................................................................................................... 296 33.2.3. Mesh Data .......................................................................................................................... 296 33.3. Physics Definition ........................................................................................................................ 296 33.3.1. Analysis Type ...................................................................................................................... 297 33.3.2. Model Data ........................................................................................................................ 297 33.4. Boundary Definition .................................................................................................................... 297 33.5. Final Operations .......................................................................................................................... 298 34. Turbomachinery Mode ...................................................................................................................... 299 34.1. Starting a New Case in Turbo Mode ............................................................................................. 299 34.2. Navigation through Turbo Mode ................................................................................................. 300 34.3. Basic Settings .............................................................................................................................. 300 34.3.1. Machine Type ..................................................................................................................... 300 34.3.2. Axes ................................................................................................................................... 300
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ANSYS CFX-Pre User's Guide 34.3.2.1. Coordinate Frame ...................................................................................................... 300 34.3.2.2. Rotational Axis ........................................................................................................... 300 34.3.2.3. Axis Visibility .............................................................................................................. 301 34.4. Component Definition ................................................................................................................ 301 34.4.1. Component Selector .......................................................................................................... 301 34.4.2. Component Type ................................................................................................................ 301 34.4.3. Mesh File ............................................................................................................................ 301 34.4.4. Passages and Alignment ..................................................................................................... 302 34.4.4.1. Passages/Mesh .......................................................................................................... 302 34.4.4.2. Passages to Model ..................................................................................................... 302 34.4.4.3. Passages in 360 .......................................................................................................... 302 34.4.4.4. Theta Offset ............................................................................................................... 302 34.4.5. Available Volumes .............................................................................................................. 302 34.4.6. Region Information ............................................................................................................ 302 34.4.7. Wall Configuration .............................................................................................................. 302 34.5. Physics Definition ........................................................................................................................ 303 34.5.1. Fluid .................................................................................................................................. 303 34.5.2. Analysis Type ...................................................................................................................... 303 34.5.3. Model Data ........................................................................................................................ 303 34.5.3.1. Reference Pressure ..................................................................................................... 303 34.5.3.2. Heat Transfer ............................................................................................................. 303 34.5.3.3. Turbulence ................................................................................................................ 303 34.5.4. Boundary Templates ........................................................................................................... 303 34.5.5. Interface ............................................................................................................................ 303 34.5.6. Solver Parameters ............................................................................................................... 304 34.5.6.1. Advection Scheme ..................................................................................................... 304 34.5.6.2. Convergence Control ................................................................................................. 304 34.5.6.3. Time Scale Option ...................................................................................................... 304 34.5.6.4. Max. Coeff. Loops ....................................................................................................... 304 34.6. Interface Definition ..................................................................................................................... 304 34.6.1. Type ................................................................................................................................... 304 34.7. Boundary Definition .................................................................................................................... 305 34.7.1. Boundary Data ................................................................................................................... 305 34.7.2. Flow Specification/Wall Influence on Flow ........................................................................... 305 34.8. Final Operations .......................................................................................................................... 306 35. Library Objects .................................................................................................................................. 307 35.1. Boiling Water .............................................................................................................................. 307 35.2. Cavitating Water ......................................................................................................................... 307 35.3. Coal Combustion ........................................................................................................................ 308 35.4. Comfort Factors .......................................................................................................................... 308 35.5. Multigrey Radiation ..................................................................................................................... 309 36. Command Editor Dialog Box ............................................................................................................. 311 36.1. Using the Command Editor ......................................................................................................... 311 36.2. Performing Command Actions .................................................................................................... 312 36.3. Using Power Syntax ..................................................................................................................... 312 Index ........................................................................................................................................................ 313

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Chapter 1: CFX-Pre Basics
CFX-Pre is the physics-definition pre-processor for ANSYS CFX. You import meshes produced in a variety of mesh generation software packages into CFX-Pre and select physical models1 used in the CFD simulation. Files produced by CFX-Pre are sent to CFX-Solver. This chapter describes: 1.1. Starting CFX-Pre 1.2. CFX-Pre Modes of Operation 1.3. Working with the CFX-Pre Interface If you want to start using CFX-Pre immediately, refer to the following CFX Tutorials: ? ? ? "Simulating Flow in a Static Mixer Using CFX in Standalone Mode" "Flow in a Static Mixer (Refined Mesh)" "Flow in a Process Injection Mixing Pipe"

1.1. Starting CFX-Pre
When starting CFX-Pre for the first time, the default system font is obtained and, if it is deemed inappropriate for CFX-Pre, a dialog box appears that enables you to choose a new font. When a new font is selected, it is stored for future sessions. For details, see Appearance (p. 47). CFX-Pre can be started in different ways: ? From within ANSYS Workbench choose Fluid Flow (CFX) from Toolbox > Analysis Systems or CFX from Toolbox > Component Systems. In the Project Schematic, right-click on the Setup cell and select Edit. From the ANSYS CFX Launcher: set the working directory and then click CFX-Pre 13.0. From the command line. The basic command is:
<CFXROOT>/bin/cfx5pre

? ?

The command-line options are described in the next section.

Starting CFX-Pre from the Command Line
To start CFX-Pre from a command line, you must either: ? ? Specify the full path to the executable (<CFXROOT>/bin/cfx5pre) Append the path to the ANSYS CFX executables (<CFXROOT>/bin/) to your PATH. – On Windows, right-click the My Computer icon and select Properties. Click the Advanced tab, then click Environment Variables. In the System variables section, edit PATH to include the path to the ANSYS CFX executables; typically this will be something like:

1

For details on physical models, see Physical Models in the CFX-Solver Modeling Guide.
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Chapter 1: CFX-Pre Basics
C:\Program Files\ANSYS Inc\v130\CFX\bin;



On Linux/UNIX, edit your .<window_manager>rc file to include the path to the ANSYS CFX executables.

Once the PATH has been updated, the basic command is simply:
cfx5pre

?

Run the executable from the ANSYS CFX Launcher Tools > Command Line (which has the path to the ANSYS CFX executables built-in).

There are a number of optional command line flags, some of which are summarized in the following table: Argument -batch <filename.pre> -display <display> -d Alternative Form Usage Starts CFX-Pre in batch modea, running the session file you enter as an argument. Displays the graphical user interface on the X11 server <display> instead of using the X11 server defined by the DISPLAY environment variable. Starts CFX-Pre in graphical user interface (GUI) mode. This is the default mode. Starts CFX-Pre in line interface mode. -gr ogl -gr mesa Loads the named CFX-Solver input file after starting. -s -v Plays the named session file after starting. Loads the named case file after starting. Specifying this option may result in additional output being sent to the standard output. Specifies the graphics system as ogl or mesa. ogl is the default.

-gui -line -graphics ogl -graphics mesa -def <file> -session <file> -cfx <file> -verbose
a

When launching CFX-Pre on a remote UNIX or Linux machine (though X, Exceed, and so on), the DISPLAY variable must be set to a valid X display before running in batch mode.The display will typically be your local Windows, Linux, or UNIX machine.The remote machine must have permission to connect to the display (for example, by use of the xhost command if the X display is on a UNIX/Linux machine).

To view a full list of command-line flags, execute:
cfx5pre -help

1.2. CFX-Pre Modes of Operation
When you select File > New Case to create a new simulation, CFX-Pre presents four different modes of operations:

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1.3. Working with the CFX-Pre Interface

Figure 1.1 The New Case Dialog Box

? ? ?

General Mode is the general-purpose mode for defining all types of CFD simulation. This mode uses the general CFX-Pre interface, which is described in Working with the CFX-Pre Interface (p. 3). Turbomachinery Mode is a customized mode for defining turbomachinery simulations. For details, see Turbomachinery Mode (p. 299). Quick Setup Mode greatly simplifies the physics setup for a simulation. Quick Setup mode is limited to a single-domain and single-phase problems; more complex physics, such as multiphase, combustion, radiation, advanced turbulence models, etc., are not available. You can, however, use Quick Setup mode to get started, and then add more physics details later. For details, see Quick Setup Mode (p. 295). Library Template Mode provides a set of library files that are available with templates for specific physical problem definitions. In this mode you can easily define a complex physics problem by loading a template file, importing a mesh, and defining specific problem data. For details, see Library Objects (p. 307).

?

1.3. Working with the CFX-Pre Interface
The CFX-Pre interface enables the easy definition of a simulation. The main components are the viewer (to display and manipulate meshes), the workspaces (to define different aspects of the physics setup), the physics message window, and the menus and tool bars (access to extra tools and utilities).

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Chapter 1: CFX-Pre Basics

Figure 1.2 Sample CFX-Pre Interface

1.3.1. Viewer
The viewer displays imported geometries and meshes and enables manipulations and transformations to be viewed. Information about boundary conditions, domains, point sources, etc., is also displayed, and items can be picked directly from the Viewer. CFX-Pre uses the same viewer as CFD-Post. Information on the generic CFX-Pre/CFD-Post viewer is available in CFX-Pre 3D Viewer (p. 17). Many aspects of the viewer appearance can be customized, as described in Options (p. 42).

1.3.2. CFX-Pre Workspace
The CFX-Pre workspace contains a tree view as well as various details views that are used during the specification of mesh import, mesh transformation, physics, regions, materials, and expressions. A powerful feature of CFX-Pre is automatic physics checking. Objects that contain inconsistent or incorrect settings are highlighted in red. Detailed error messages are shown in the physics validation summary window. For details, see Physics Message Window (p. 11).

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1.3.2. CFX-Pre Workspace

1.3.2.1. Outline Tree View
The Outline tree view displays a summary of the physics that have been defined for the simulation. The tree view window initially contains a default list of objects in a tree format. The following topics are discussed in this section: ? ? ? General Considerations (p. 5) Outline Tree View Structure (p. 5) Outline Tree View Shortcut Menu Commands (p. 7)

Tip
Typing Ctrl +F activates the search facility, which can be used to quickly locate an item in the tree. Note that the search is case-sensitive and that the text box disappears after a few seconds of inactivity.

1.3.2.1.1. General Considerations
When working with the tree view, consider the following: ? ? New objects are displayed in the tree as they are created. Clicking on any object that is applied to a region will highlight that region in the viewer when highlighting is enabled (that is, when the Highlighting icon see 3D Viewer Toolbar (p. 19). ? ? is selected in the 3D Viewer toolbar). For details,

Objects shown in red contain incorrect physics definitions. Right-click on an object (or group selection of objects) to display the shortcut menu. For details, see Outline Tree View Shortcut Menu Commands (p. 7).

1.3.2.1.2. Outline Tree View Structure
The Outline tab displays the tree view, which shows a summary of the current physics definition for a simulation. The tree structure displayed reflects the structure used in the CFX Command Language (CCL) for physics definition. You can select any object in the tree and double-click to gain direct access to the appropriate tab to edit its settings. You can also right-click an object and display the CCL definition of an object in the Command Editor dialog box, where it can be edited. The remainder of this section describes the main areas in the Outline view.

1.3.2.1.2.1. Mesh
Provides access to all mesh operations in CFX-Pre. This includes mesh import, mesh transformations, and the render/visibility properties of meshes in the viewer. Meshes generated in many other mesh generation packages can be imported into CFX-Pre. For details, see Importing and Transforming Meshes (p. 63). Meshes that have been glued together are listed under Connectivity in the tree view.

1.3.2.1.2.2. Simulation
Enables you to define the one or more analyses of the simulation.
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Chapter 1: CFX-Pre Basics Optionally, you can open a copy of the Simulation branch in a separate tab. 1.3.2.1.2.2.1. Analysis Enables you to define and edit an analysis, as described in the sections that follow. 1.3.2.1.2.2.1.1. Analysis Type Enables the specification of an analysis as steady state or transient, and whether it requires coupling to an external solver. For details, see Analysis Type (p. 97). 1.3.2.1.2.2.1.2. Domains Enables you to define and edit the type, properties and region of the fluid, porous or solid. For details, see Domains (p. 101), Boundary Conditions (p. 141), Subdomains (p. 173) and Source Points (p. 169). 1.3.2.1.2.2.1.3. Domain Interfaces Enables you to define and edit the method of connecting meshes or domains together. For details, see Domain Interfaces (p. 131). 1.3.2.1.2.2.1.4. Global Initialization Enables you to set global initial conditions (across all domains). Domain specific initialization is set through the domain forms. For details, see Initialization (p. 159). 1.3.2.1.2.2.1.5. Solver Enables the defining and editing of Solution Units (p. 187), Solver Control (p. 189), Solver: Expert Parameter (p. 58), Output Control (p. 201) and Mesh Adaption (p. 225). 1.3.2.1.2.2.2. Coordinate Frame Creates and edits coordinate frames. A Cartesian coordinate frame exists by default, but other Cartesian coordinate frames can be made. For details, see Coordinate Frames in the CFX-Solver Modeling Guide and Coordinate Frames (p. 233). 1.3.2.1.2.2.3. Materials / Reactions Creates, edits, and displays materials and reactions. Many different material types can be defined, edited or imported. Specialist materials and reactions can be imported from external files, such as the RGP (Real Gas Properties) file and Flamelet reaction files. For details, see Materials and Reactions (p. 237). 1.3.2.1.2.2.4. Expressions, Functions, and Variables Used to create, edit and plot expressions, user functions, user routines, and Additional Variables. For details, refer to the following sections: ? ? ? ? Additional Variables (p. 253) Expressions (p. 259) User Functions (p. 263) User Routines (p. 269)

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1.3.2. CFX-Pre Workspace

1.3.2.1.2.3. Simulation Control
Enables you to set up the control of analyses in the simulation. This control is facilitated by defining and editing one or more configurations as well as global solver execution control.

1.3.2.1.2.4. Case Options
The Graphics Style, Labels and Markers, and General options enable you to override the defaults for the current simulation only — they will not be retained for future simulations. The default settings for CFX-Pre are set in the Edit > Options dialog — these settings are retained and take effect when a new case is started. See CFX-Pre Options (p. 42) for a description of these settings.

1.3.2.1.2.5. Extensions
Enables you to access to any customized extensions available to CFX-Pre. For details, see CFX-Pre Extensions Menu (p. 61).

1.3.2.1.2.6. Outline Tree View Shortcut Menu Commands
Right-clicking on any object in the tree view displays a shortcut menu. Double-clicking on an object performs the default action for that object. Shortcut menu command descriptions follow: Command Configuration Copy Define Connection Delete Description Simulation Control > Configurations > Insert > Configuration opens the Configuration Editor. The Copy command is usually combined with Paste to quickly replicate objects. Mesh > Define Connection opens the Mesh Connections Editor. Deletes the selected object. The physics for the simulation are checked after objects are deleted. Objects containing invalid parameters are highlighted in red in the tree view. Deletes the mesh, but not the named areas in the Outline view. When this happens, the Physics Message Window will show errors that say the named objects cannot be found. If you then import a new mesh that uses the same names for objects, the names will be resolved and the errors will disappear. Copies the definition of the selected object to a new one. You will be required to enter a name for the duplicated object, which will then be created at the same level (that is, for a boundary condition, the new boundary will be created in the same domain as the initial object). Opens the relevant tab where new parameters for the object can be entered. In most casesa, you can also edit an object by double-clicking it in the tree view. Edit In Command Editor Expand/Collapse Sub-Branches Export CCL Opens the Command Editor dialog box and displays the CCL definition for the highlighted object. You can edit the CCL directly to change the object definitiona. For details, see Command Editor Dialog Box (p. 311). Provides a fast way to navigate the tree view. Opens the Export CCL dialog box, which is similar to the dialog box described in Export Region Data, below.

Delete All Mesh

Duplicate

Edit

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Chapter 1: CFX-Pre Basics Command Export Region Data Glue Adjacent Meshes Description Opens the Export Region CCL dialog box, used to save the region data to a .ccl file. If there are multiple mesh assemblies that have matched meshes, you can use this option to try to glue them together. Select the assemblies in the tree view (while holding down the Ctrl key). Gluing can be useful to avoid setting up a GGI interface within a domain, but does require that the meshes match exactly on the surfaces that are to be glued. When you transform or copy multiple assemblies, each copy is not only glued to its original assembly or to other copies, but also to any other assemblies that are transformed or created. For more information, see Gluing Meshes Together (p. 85). Hide Hide Interface Boundaries Import CCL Import Mesh Import Library Data Import Region Data Insert Makes the active object invisible in the viewer. Hide has the same effect as clearing the check box next to an object in the tree view. Hides the interface boundaries in the Outline view. Opens the Import CCL dialog box, which is similar to the dialog box described in Import Region Data, below. Opens the Import Mesh dialog box. This is used to import a new mesh using an appropriate file. For details, see Importing Meshes (p. 63). This command, available from the Materials branch in the tree view, is used to add a new material to the simulation. Examples of such a material include Methanol CH4O, Rubber, Water at 25 C, and many more. Opens the Import Region CCL dialog box. This is used to load region data from a .ccl file. Various objects are available for insertion, depending on which object is highlighted. All of the options available from this menu can also be accessed from the Insert menu. For details, see CFX-Pre Insert Menu (p. 55). Opens the Mesh Statistics dialog box and provides a detailed information about the active mesh. The Mesh Statistics dialog box can be invoked for one or more assemblies and/or primitive 3D/2D regions. The data displayed includes the number of nodes, elements, the number of each element type, and physical extents of the mesh. The Maximum Edge Length Ratio is also calculated. The Paste command is available when you have already used the Copy command on an object. To avoid producing objects with the same name, you are prompted to provide a name when you paste the new object. For objects that contain a location parameter (such as domains and boundary conditions), you will usually need to edit the new object after pasting it to avoid multiple objects that reference the same location. If you are pasting a domain object, then you will need to edit each child object in the domain that references a location. For example, you will need to change the locations that boundary conditions reference so that they point to locations in the new domain. You can simply delete a default domain boundary in this situation; this will allow CFX-Pre to create a new default boundary for the domain that references the correct locations. Reload Mesh Files If any of the mesh regions become corrupted or are accidentally deleted, selecting Reload Mesh Files reloads all mesh files used in the simulation. This command
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Mesh Statistics

Paste

8

1.3.2. CFX-Pre Workspace Command Description cannot be used to insert a new mesh; do to so, select Import Mesh. For details, see Reload Mesh Files Command (p. 34).

Note
This command is not required (and is not available) in CFX-Pre launched from ANSYS Workbench. Rename Render Changes the selected object’s name. Enables you to change the appearance of almost any object. For example, a boundary condition or domain interface can be displayed with a solid color, the transparency of a domain can be altered, and so on. Invokes a message box that shows a summary of the interfaces and their types. For details, see Mesh Connection Options in the CFX-Solver Modeling Guide. Makes the active object either visible (Show) or invisible (Hide) in the viewer. Show and Hide have the same respective effects as selecting and clearing the check box next to a specific object in the tree view. Shows the interface boundaries in the Outline view. Enables you to access the Define Run, Run Solver, and Run Solver and Monitor commands. These commands are also available from the main toolbar. Opens the Mesh Transformation Editor dialog box, allowing you to modify the location of the active mesh through rotation, translation, or reflection. The mesh can also be resized using a scaling method. For details, see Transform Mesh Command (p. 79). Available when an expression is selected, this command allows the expression to be used as a workbench input parameter. This command, available for the Mesh object, opens a new tab that presents a detailed mesh information in one of two ways. Selecting View By > Source File displays the mesh regions based on the mesh file provided, whereas View By > Region Type organizes the areas of the mesh based on the defined 2D regions. Simulation > View in New Tab enables you to view a copy of the contents of the Simulation branch in a separate tab. Prompts you to save a DEF file, then automatically starts CFD-Post with that file loaded.

Report Interface Summary Show/Hide

Show Interface Boundaries Start Solver Transform Mesh

Use as Workbench Input Parameter View By

View in New Tab View in CFD-Post

Write Solver Input Has the same effect as clicking Write Solver Input File or selecting Tools > Solve File > Write Solver Input File from the menu bar. For details, see Write Solver Input File Command (p. 60).
a

An expression that is set as an input parameter in ANSYS Workbench cannot be edited in CFX-Pre or CFD-Post (as the results of such edits are not passed to ANSYS Workbench) and will be grayed out. However, the expression can be declared to no longer be an input parameter or it can be deleted.

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Chapter 1: CFX-Pre Basics

1.3.2.2. Details View
Details view is a generic term for the editor pane that opens when you edit an object in the Outline tree view. These editors appear on tabs beside the Outline tab and present the fields and controls that define the object.

Figure 1.3 Sample CFX-Pre Details View

The optional toggles provide you with the opportunity to view and, if desired, to override CFX-Pre default settings. In the example above, selecting the Upper Courant Number option has made it possible to see the default value for that setting; the white background indicates that you can the edit that value. Most CFX-Pre settings have default values that will enable you to define an object or set a control as easily as possible. If there is a setting that requires you to set a value, basic physics checking occurs when you click OK or Apply on a details view and most missing settings are detected then. Complete physics checking

10

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1.3.3. Physics Message Window takes place when you attempt to write a solver file and all missing settings are detected and reported at that time. You use the Details view to define the properties of an object. The Details view contains one or more tabs, depending on the type of object being defined. Many properties can be set via a CEL expression. To enter an expression: 1. 2. 3. Click in the field for a property. Click the Enter Expression icon that appears beside the field. This enables the field to accept an expression name. Either enter an expression definition directly, or type the name of an existing expression. You must ensure that the expression evaluates to a value having appropriate units for the property that uses the expression.

For details on CEL expressions, see Expressions (p. 259). For CFX components in ANSYS Workbench, any CEL expression can be made into a parameterized CEL expression by defining it as a Workbench input parameter. You can do this by creating an expression and parameterize it by right-clicking it in the Expression editor. You can then use that expression as the value of a property. You can change a property from being specified by a Workbench input parameter. However, the corresponding CEL expression persists and can be managed by the Expression editor.

1.3.3. Physics Message Window
As you work through your simulation, CFX-Pre continually checks the physics definitions you have specified. Whenever an action is carried out, the physics validator runs a check on the CCL definitions of all the objects created up to that point. Physics checking is carried out by comparing the current CCL data against library files such as RULES, VARIABLES and PHYSICS, which are known to contain only valid physics specifications. If an inconsistency is found in the physics, the object with associated error(s) is highlighted in red text in the tree view. In addition to object name highlighting, the physics validation window displays all error types in the simulation: global errors, physics errors and expression errors. The output in this window gives an explanation of each of the detected errors. Double-clicking on a red item or a maroon item (an expression error) in the physics validation window will take you to the correct place in order to edit the object. Global errors apply to the entire simulation and show errors that are not specific physics errors. Often these errors show required objects that need to be defined to complete the simulation (for example, initial conditions or a domain). They also show invalid referencing of regions in a simulation. In some cases, the global errors offer a suggestion rather than being a definite error. For example, if you have created two valid boundary conditions on one region, a global error will be shown (despite the fact that the physics for both boundary conditions may be correct) because you cannot specify more than one boundary condition on any given surface. Physics errors (highlighted in red) involve an incorrect application of physics. ? ? Global errors appear in blue text. Specific physics errors appear in red text. You can double-click on these to edit the object containing the error.

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11

Chapter 1: CFX-Pre Basics There are two common situations when you are likely to encounter physics errors: 1. CFX-Pre defines some objects, such as the Solver Control settings, by default. If you create a new object that is not compatible with the default objects settings, the physics validation summary window will show errors in the default object. This occurs when creating a solid domain because the default Solver Control settings do not contain a solid time scale. These errors will disappear when you define the Solver Control settings. When changing the physics of an existing model. There are many instances where you might want to change the description of your simulation. One particular situation is when you want to use the values in a results file as the initial field for another run with different physics. When a domain is modified, perhaps with new model options, you will receive errors or warnings in the physics validation summary window if existing boundary conditions, initialization, solver control, etc., need to be revisited and updated. This happens, for example, when the turbulence model is ? ? changed from the laminar model to the ? model and the boundary conditions for the laminar case do not contain turbulence data (for example, at an Inlet). You should fix any such errors before writing a CFX-Solver input file. You should update boundary conditions if the number of Additional Variables has been increased, or if the units for Additional Variable specifications have been changed. If the simulation is set up correctly, there will not be any physics errors when you are ready to write the CFX-Solver input file.

2.

1.3.3.1. Physics Errors from Old .def/.res Files
When you load CFX-Solver input/results files from previous versions of ANSYS CFX, you may receive error messages, despite the fact that the files can be run in the CFX-Solver. This is due to differences in the previous CFX-Solver input files. In CFX-Pre, a more strict approach to CCL structure and content has been implemented to ensure the integrity of the CCL made available to the CFX-Solver. CFX-Pre performs some automatic updates when opening CFX-Solver input or results files from previous versions of ANSYS CFX.

1.3.3.2. Physics Message Window Shortcut Menu Commands
By right-clicking on a message in the physics message window you perform a number of functions including: ? ? ? Copy: This enables you to copy the text of the selected message. Edit: So that you can edit the object generating the error in the Details View. Auto Fix Physics: This enables you to attempt

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CFX13_如何使用CFX及Workbench_图文.ppt
created (.wbpj), using the user specified file name (e.g. MyFile.wbpj...Release 13.0 December 2010 2-21 Workbench and CFX Workflow CFX-Pre ...
CFX13_10_热传导_图文.ppt
10-12 Release 13.0 December 2010 Heat Transfer Thermal Contact Resistance ?...Target when defining Solver Control in CFX-Pre Training Manual ANSYS, Inc....
ANSYS CFX-Solver 15.0 用户管理指南.pdf
vii CFX-Solver Manager User's Guide 13.4. Energy Models ......For details, see Write Solver Input File Command in the CFX-Pre User's Guide. 1....
CFX13_11_CEL编程输入_图文.ppt
CEL - CFX Expression Language Training Manual Allows the user to create...11-7 Release 13.0 December 2010 CFX Expression Language CEL in CFX-Pre:...
cfx中文教程_图文.pdf
定义物理条件 CFX-Pre ? 求解控制方程 设置求解...CFX 11.0 ANSYS, Inc. Proprietary Inventory #...Proprietary 保存文件 Inventory #002445 2-13 CFX...
CFX13_09_湍流模型_图文.ppt
暂无评价|0人阅读|0次下载|举报文档CFX13_09_湍流模型_计算机软件及应用_IT/...Guide >> Turbulence and Near-Wall Modeling >> Modeling Flow Near the Wall...
两种气体混合cfx.pdf
两种气体混合cfx_机械/仪表_工程科技_专业资料。CFX...required guideline to conduct a combustion ...pre exponential factor: The activation temperature ...
CFX求解设定--.doc
CFX求解设定--_交通运输_工程科技_专业资料。介质 水蒸气 入口压力 6kpa 入口温度 36.1℃ 流量 0.139kg/s 设计转速 30000rpm CFX-Pre Turbo mode 第一步 ...
CFX13_05_结果后处理_图文.ppt
5-12 Release 13.0 December 2010 CFD Post Location Types ? User Surface ...Export Profile Boundary Data: for use in CFX-Pre General formatted ...
CFX13_04_解算器设置_图文.ppt
The CFX-Solver Manager is a graphical user interface used to: ANSYS, Inc. Proprietary ? 2010 ANSYS, Inc. All rights reserved. 4-30 Release 13.0 ...
CFX13_03_计算域及边界条件设置_图文.ppt
暂无评价|0人阅读|0次下载|举报文档CFX13_03_计算域及边界条件设置_数
CFX13_12_移动域_图文.ppt
暂无评价|0人阅读|0次下载|举报文档CFX13_12_移动域_计算机软件及应用_IT/计算机...Expressions and User Functions can be used Sequential loading of pre-...
MOD13_UserGuide_图文.pdf
暂无评价|0人阅读|0次下载|举报文档MOD13_UserGuide_天文/地理
CFX13_B_Turbo_图文.ppt
B-10 Release 13.0 December 2010 Turbo Pre and Post CFX-Pre Turbo Mode ...If auto-initialization fails, user must initialize Turbo mode manually and ...
CFX13_11_CEL_图文.ppt
User Fortran can also be created Function sin(x) cos(x) tan(x) *** ...11-7 Release 13.0 December 2010 CFX Expression Language CEL in CFX-Pre:...
CFX13_10_HeatTransfer_图文.ppt
CFX13_10_HeatTransfer - Heat Transfer Tr
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