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ANSYS Fluent Tutorial Guide
Release 17.0ANSYS, Inc.
January 2016Southpointe
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Table of Contents
Using This Manual ....................................................................................................................................... xv
1.What’s In This Manual ......................................................................................................................... xv
2. The Contents of the Fluent Manuals ................................................................................................... xv
3. Where to Find the Files Used in the Tutorials ..................................................................................... xvii
4. How To Use This Manual ................................................................................................................... xvii
4.1. For the Beginner ...................................................................................................................... xvii
4.2. For the Experienced User ......................................................................................................... xvii
5.Typographical Conventions Used In This Manual .............................................................................. xviii
1. Introduction to Using ANSYS Fluent in ANSYS Workbench: Fluid Flow and Heat Transfer in a Mixing
Elbow .......................................................................................................................................................... 1
1.1. Introduction ..................................................................................................................................... 1
1.2. Prerequisites ..................................................................................................................................... 2
1.3. Problem Description ......................................................................................................................... 2
1.4. Setup and Solution ........................................................................................................................... 3
1.4.1. Preparation .............................................................................................................................. 4
1.4.2. Creating a Fluent Fluid Flow Analysis System in ANSYS Workbench ........................................... 5
1.4.3. Creating the Geometry in ANSYS DesignModeler ...................................................................... 9
1.4.4. Meshing the Geometry in the ANSYS Meshing Application ...................................................... 20
1.4.5. Setting Up the CFD Simulation in ANSYS Fluent ...................................................................... 27
1.4.5.1. Starting ANSYS Fluent ................................................................................................... 27
1.4.5.2. Setting Up Domain ........................................................................................................ 29
1.4.5.3. Setting Up Physics ......................................................................................................... 31
1.4.6. Solving .................................................................................................................................. 42
1.4.7. Displaying Results in ANSYS Fluent and CFD-Post .................................................................... 51
1.4.8. Duplicating the Fluent-Based Fluid Flow Analysis System ........................................................ 60
1.4.9. Changing the Geometry in ANSYS DesignModeler .................................................................. 61
1.4.10. Updating the Mesh in the ANSYS Meshing Application .......................................................... 63
1.4.11. Calculating a New Solution in ANSYS Fluent .......................................................................... 65
1.4.12. Comparing the Results of Both Systems in CFD-Post .............................................................. 67
1.5. Summary ........................................................................................................................................ 72
2. Parametric Analysis in ANSYS Workbench Using ANSYS Fluent ........................................................... 73
2.1. Introduction ................................................................................................................................... 73
2.2. Prerequisites ................................................................................................................................... 74
2.3. Problem Description ....................................................................................................................... 74
2.4. Setup and Solution ......................................................................................................................... 77
2.4.1. Preparation ............................................................................................................................ 78
2.4.2. Adding Constraints to ANSYS DesignModeler Parameters in ANSYS Workbench ...................... 78
2.4.3. Setting Up the CFD Simulation in ANSYS Fluent ...................................................................... 87
2.4.3.1. Starting ANSYS Fluent ................................................................................................... 87
2.4.3.2. Setting Up Domain ........................................................................................................ 89
2.4.3.3. Setting Up Physics ......................................................................................................... 89
2.4.4. Defining Input Parameters in ANSYS Fluent ............................................................................. 92
2.4.5. Solving .................................................................................................................................. 97
2.4.6. Postprocessing and Setting the Output Parameters in ANSYS CFD-Post ................................. 100
2.4.7. Creating Additional Design Points in ANSYS Workbench ........................................................ 112
2.4.8. Postprocessing the New Design Points in CFD-Post ............................................................... 114
2.4.9. Summary ............................................................................................................................. 120
3. Introduction to Using ANSYS Fluent: Fluid Flow and Heat Transfer in a Mixing Elbow ...................... 121
3.1. Introduction ................................................................................................................................. 121
3.2. Prerequisites ................................................................................................................................. 121
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3.3. Problem Description ..................................................................................................................... 121
3.4. Setup and Solution ....................................................................................................................... 122
3.4.1. Preparation .......................................................................................................................... 123
3.4.2. Launching ANSYS Fluent ...................................................................................................... 123
3.4.3. Reading the Mesh ................................................................................................................ 126
3.4.4. Setting Up Domain ............................................................................................................... 131
3.4.5. Setting Up Physics ................................................................................................................ 133
3.4.6. Solving ................................................................................................................................ 145
3.4.7. Displaying the Preliminary Solution ...................................................................................... 155
3.4.8. Using the Coupled Solver ..................................................................................................... 171
3.4.9. Adapting the Mesh ............................................................................................................... 174
3.5. Summary ...................................................................................................................................... 190
4. Modeling Periodic Flow and Heat Transfer ......................................................................................... 191
4.1. Introduction ................................................................................................................................. 191
4.2. Prerequisites ................................................................................................................................. 191
4.3. Problem Description ..................................................................................................................... 192
4.4. Setup and Solution ....................................................................................................................... 192
4.4.1. Preparation .......................................................................................................................... 193
4.4.2. Mesh .................................................................................................................................... 193
4.4.3. General Settings ................................................................................................................... 196
4.4.4. Models ................................................................................................................................. 196
4.4.5. Materials .............................................................................................................................. 196
4.4.6. Cell Zone Conditions ............................................................................................................ 198
4.4.7. Periodic Conditions .............................................................................................................. 199
4.4.8. Boundary Conditions ............................................................................................................ 199
4.4.9. Solution ............................................................................................................................... 200
4.4.10. Postprocessing ................................................................................................................... 204
4.5. Summary ...................................................................................................................................... 214
4.6. Further Improvements .................................................................................................................. 215
5. Modeling External Compressible Flow ............................................................................................... 217
5.1. Introduction ................................................................................................................................. 217
5.2. Prerequisites ................................................................................................................................. 217
5.3. Problem Description ..................................................................................................................... 218
5.4. Setup and Solution ....................................................................................................................... 218
5.4.1. Preparation .......................................................................................................................... 218
5.4.2. Mesh .................................................................................................................................... 219
5.4.3. Solver .................................................................................................................................. 222
5.4.4. Models ................................................................................................................................. 222
5.4.5. Materials .............................................................................................................................. 223
5.4.6. Boundary Conditions ............................................................................................................ 225
5.4.7. Operating Conditions ........................................................................................................... 227
5.4.8. Solution ............................................................................................................................... 228
5.4.9. Postprocessing ..................................................................................................................... 246
5.5. Summary ...................................................................................................................................... 253
5.6. Further Improvements .................................................................................................................. 253
6. Modeling Transient Compressible Flow .............................................................................................. 255
6.1. Introduction ................................................................................................................................. 255
6.2. Prerequisites ................................................................................................................................. 255
6.3. Problem Description ..................................................................................................................... 256
6.4. Setup and Solution ....................................................................................................................... 256
6.4.1. Preparation .......................................................................................................................... 256
6.4.2. Reading and Checking the Mesh ........................................................................................... 257
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Tutorial Guide
6.4.3. Solver and Analysis Type ....................................................................................................... 259
6.4.4. Models ................................................................................................................................. 260
6.4.5. Materials .............................................................................................................................. 261
6.4.6. Operating Conditions ........................................................................................................... 262
6.4.7. Boundary Conditions ............................................................................................................ 263
6.4.8. Solution: Steady Flow ........................................................................................................... 265
6.4.9. Enabling Time Dependence and Setting Transient Conditions ............................................... 279
6.4.10. Specifying Solution Parameters for Transient Flow and Solving ............................................ 282
6.4.11. Saving and Postprocessing Time-Dependent Data Sets ....................................................... 285
6.5. Summary ...................................................................................................................................... 299
6.6. Further Improvements .................................................................................................................. 300
7. Modeling Radiation and Natural Convection ..................................................................................... 301
7.1. Introduction ................................................................................................................................. 301
7.2. Prerequisites ................................................................................................................................. 301
7.3. Problem Description ..................................................................................................................... 301
7.4. Setup and Solution ....................................................................................................................... 302
7.4.1. Preparation .......................................................................................................................... 302
7.4.2. Reading and Checking the Mesh ........................................................................................... 303
7.4.3. Solver and Analysis Type ....................................................................................................... 304
7.4.4. Models ................................................................................................................................. 305
7.4.5. Defining the Materials .......................................................................................................... 308
7.4.6. Operating Conditions ........................................................................................................... 310
7.4.7. Boundary Conditions ............................................................................................................ 310
7.4.8. Obtaining the Solution ......................................................................................................... 314
7.4.9. Postprocessing ..................................................................................................................... 321
7.4.10. Comparing the Contour Plots after Varying Radiating Surfaces ............................................ 335
7.4.11. S2S Definition, Solution, and Postprocessing with Partial Enclosure ...................................... 347
7.5. Summary ...................................................................................................................................... 351
7.6. Further Improvements .................................................................................................................. 351
8. Using the Discrete Ordinates Radiation Model ................................................................................... 353
8.1. Introduction ................................................................................................................................. 353
8.2. Prerequisites ................................................................................................................................. 353
8.3. Problem Description ..................................................................................................................... 354
8.4. Setup and Solution ....................................................................................................................... 354
8.4.1. Preparation .......................................................................................................................... 355
8.4.2. Mesh .................................................................................................................................... 355
8.4.3. General Settings ................................................................................................................... 356
8.4.4. Models ................................................................................................................................. 358
8.4.5. Materials .............................................................................................................................. 359
8.4.6. Cell Zone Conditions ............................................................................................................ 362
8.4.7. Boundary Conditions ............................................................................................................ 364
8.4.8. Solution ............................................................................................................................... 372
8.4.9. Postprocessing ..................................................................................................................... 375
8.4.10. Iterate for Higher Pixels ....................................................................................................... 383
8.4.11. Iterate for Higher Divisions ................................................................................................. 387
8.4.12. Make the Reflector Completely Diffuse ............................................................................... 393
8.4.13. Change the Boundary Type of Baffle ................................................................................... 395
8.5. Summary ...................................................................................................................................... 396
8.6. Further Improvements .................................................................................................................. 396
9. Using a Non-Conformal Mesh ............................................................................................................. 397
9.1. Introduction ................................................................................................................................. 397
9.2. Prerequisites ................................................................................................................................. 397
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Tutorial Guide
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