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ANSYS+Fluent+Tutorial+Guide16.0
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ANSYS Fluent Tutorial Guide
Release 16.0ANSYS, Inc.
January 2015Southpointe
2600 ANSYS Drive
Canonsburg, PA 15317
ANSYS, Inc. is
certified to ISO
9001:2008.
ansysinfo@ansys.com
http://www.ansys.com
(T) 724-746-3304
(F) 724-514-9494
Copyright and Trademark Information
© 2014-2015 SAS IP, Inc. All rights reserved. Unauthorized use, distribution or duplication is prohibited.
ANSYS, ANSYS Workbench, Ansoft, AUTODYN, EKM, Engineering Knowledge Manager, CFX, FLUENT, HFSS, AIM
and any and all ANSYS, Inc. brand, product, service and feature names, logos and slogans are registered trademarks
or trademarks of ANSYS, Inc. or its subsidiaries in the United States or other countries. ICEM CFD is a trademark
used by ANSYS, Inc. under license. CFX is a trademark of Sony Corporation in Japan. All other brand, product,
service and feature names or trademarks are the property of their respective owners.
Disclaimer Notice
THIS ANSYS SOFTWARE PRODUCT AND PROGRAM DOCUMENTATION INCLUDE TRADE SECRETS AND ARE CONFID-
ENTIAL AND PROPRIETARY PRODUCTS OF ANSYS, INC., ITS SUBSIDIARIES, OR LICENSORS. The software products
and documentation are furnished by ANSYS, Inc., its subsidiaries, or affiliates under a software license agreement
that contains provisions concerning non-disclosure, copying, length and nature of use, compliance with exporting
laws, warranties, disclaimers, limitations of liability, and remedies, and other provisions. The software products
and documentation may be used, disclosed, transferred, or copied only in accordance with the terms and conditions
of that software license agreement.
ANSYS, Inc. is certified to ISO 9001:2008.
U.S. Government Rights
For U.S. Government users, except as specifically granted by the ANSYS, Inc. software license agreement, the use,
duplication, or disclosure by the United States Government is subject to restrictions stated in the ANSYS, Inc.
software license agreement and FAR 12.212 (for non-DOD licenses).
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See the legal information in the product help files for the complete Legal Notice for ANSYS proprietary software
and third-party software. If you are unable to access the Legal Notice, please contact ANSYS, Inc.
Published in the U.S.A.
Table of Contents
Using This Manual ...................................................................................................................................... xiii
1. What’s In This Manual ........................................................................................................................ xiii
2.The Contents of the Fluent Manuals ................................................................................................... xiii
3.Where to Find the Files Used in the Tutorials ....................................................................................... xv
4. How To Use This Manual ..................................................................................................................... xv
4.1. For the Beginner ....................................................................................................................... xv
4.2. For the Experienced User ........................................................................................................... xv
5.Typographical Conventions Used In This Manual ................................................................................ xvi
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 ........................................... 4
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
1.4.6. Displaying Results in ANSYS Fluent and CFD-Post .................................................................... 51
1.4.7. Duplicating the Fluent-Based Fluid Flow Analysis System ........................................................ 60
1.4.8. Changing the Geometry in ANSYS DesignModeler .................................................................. 61
1.4.9. Updating the Mesh in the ANSYS Meshing Application ........................................................... 63
1.4.10. Calculating a New Solution in ANSYS Fluent .......................................................................... 65
1.4.11. 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
2.4.4. Defining Input Parameters in ANSYS Fluent and Running the Simulation ................................. 92
2.4.5. Postprocessing and Setting the Output Parameters in ANSYS CFD-Post ................................. 101
2.4.6. Creating Additional Design Points in ANSYS Workbench ........................................................ 113
2.4.7. Postprocessing the New Design Points in CFD-Post ............................................................... 116
2.4.8. Summary ............................................................................................................................. 122
3. Introduction to Using ANSYS Fluent: Fluid Flow and Heat Transfer in a Mixing Elbow ...................... 123
3.1. Introduction ................................................................................................................................. 123
3.2. Prerequisites ................................................................................................................................. 123
3.3. Problem Description ..................................................................................................................... 123
3.4. Setup and Solution ....................................................................................................................... 124
3.4.1. Preparation .......................................................................................................................... 125
3.4.2. Launching ANSYS Fluent ...................................................................................................... 125
3.4.3. Reading the Mesh ................................................................................................................ 128
3.4.4. General Settings ................................................................................................................... 133
3.4.5. Models ................................................................................................................................. 135
3.4.6. Materials .............................................................................................................................. 138
iii
Release 16.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
3.4.7. Cell Zone Conditions ............................................................................................................ 140
3.4.8. Boundary Conditions ............................................................................................................ 142
3.4.9. Solution ............................................................................................................................... 147
3.4.10. Displaying the Preliminary Solution .................................................................................... 157
3.4.11. Using the Coupled Solver ................................................................................................... 172
3.4.12. Adapting the Mesh ............................................................................................................. 175
3.5. Summary ...................................................................................................................................... 191
4. Modeling Periodic Flow and Heat Transfer ......................................................................................... 193
4.1. Introduction ................................................................................................................................. 193
4.2. Prerequisites ................................................................................................................................. 193
4.3. Problem Description ..................................................................................................................... 194
4.4. Setup and Solution ....................................................................................................................... 194
4.4.1. Preparation .......................................................................................................................... 195
4.4.2. Mesh .................................................................................................................................... 195
4.4.3. General Settings ................................................................................................................... 198
4.4.4. Models ................................................................................................................................. 198
4.4.5. Materials .............................................................................................................................. 199
4.4.6. Cell Zone Conditions ............................................................................................................ 200
4.4.7. Periodic Conditions .............................................................................................................. 201
4.4.8. Boundary Conditions ............................................................................................................ 202
4.4.9. Solution ............................................................................................................................... 203
4.4.10. Postprocessing ................................................................................................................... 207
4.5. Summary ...................................................................................................................................... 218
4.6. Further Improvements .................................................................................................................. 219
5. Modeling External Compressible Flow ............................................................................................... 221
5.1. Introduction ................................................................................................................................. 221
5.2. Prerequisites ................................................................................................................................. 221
5.3. Problem Description ..................................................................................................................... 222
5.4. Setup and Solution ....................................................................................................................... 222
5.4.1. Preparation .......................................................................................................................... 222
5.4.2. Mesh .................................................................................................................................... 223
5.4.3. General Settings ................................................................................................................... 226
5.4.4. Models ................................................................................................................................. 226
5.4.5. Materials .............................................................................................................................. 227
5.4.6. Boundary Conditions ............................................................................................................ 229
5.4.7. Operating Conditions ........................................................................................................... 231
5.4.8. Solution ............................................................................................................................... 232
5.4.9. Postprocessing ..................................................................................................................... 249
5.5. Summary ...................................................................................................................................... 255
5.6. Further Improvements .................................................................................................................. 255
6. Modeling Transient Compressible Flow .............................................................................................. 257
6.1. Introduction ................................................................................................................................. 257
6.2. Prerequisites ................................................................................................................................. 257
6.3. Problem Description ..................................................................................................................... 258
6.4. Setup and Solution ....................................................................................................................... 258
6.4.1. Preparation .......................................................................................................................... 258
6.4.2. Reading and Checking the Mesh ........................................................................................... 259
6.4.3. Specifying Solver and Analysis Type ...................................................................................... 261
6.4.4. Specifying the Models .......................................................................................................... 263
6.4.5. Editing the Material Properties ............................................................................................. 264
6.4.6. Setting the Operating Conditions ......................................................................................... 265
6.4.7. Creating the Boundary Conditions ........................................................................................ 266
Release 16.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.iv
Tutorial Guide
6.4.8. Setting the Solution Parameters for Steady Flow and Solving ................................................ 267
6.4.9. Enabling Time Dependence and Setting Transient Conditions ............................................... 281
6.4.10. Specifying Solution Parameters for Transient Flow and Solving ............................................ 284
6.4.11. Saving and Postprocessing Time-Dependent Data Sets ....................................................... 287
6.5. Summary ...................................................................................................................................... 301
6.6. Further Improvements .................................................................................................................. 302
7. Modeling Radiation and Natural Convection ..................................................................................... 303
7.1. Introduction ................................................................................................................................. 303
7.2. Prerequisites ................................................................................................................................. 303
7.3. Problem Description ..................................................................................................................... 303
7.4. Setup and Solution ....................................................................................................................... 304
7.4.1. Preparation .......................................................................................................................... 304
7.4.2. Reading and Checking the Mesh ........................................................................................... 305
7.4.3. Specifying Solver and Analysis Type ...................................................................................... 306
7.4.4. Specifying the Models .......................................................................................................... 307
7.4.5. Defining the Materials .......................................................................................................... 310
7.4.6. Specifying Boundary Conditions ........................................................................................... 312
7.4.7. Obtaining the Solution ......................................................................................................... 316
7.4.8. Postprocessing ..................................................................................................................... 322
7.4.9. Comparing the Contour Plots after Varying Radiating Surfaces .............................................. 338
7.4.10. S2S Definition, Solution, and Postprocessing with Partial Enclosure ...................................... 350
7.5. Summary ...................................................................................................................................... 354
7.6. Further Improvements .................................................................................................................. 354
8. Using the Discrete Ordinates Radiation Model ................................................................................... 355
8.1. Introduction ................................................................................................................................. 355
8.2. Prerequisites ................................................................................................................................. 355
8.3. Problem Description ..................................................................................................................... 356
8.4. Setup and Solution ....................................................................................................................... 356
8.4.1. Preparation .......................................................................................................................... 357
8.4.2. Mesh .................................................................................................................................... 357
8.4.3. General Settings ................................................................................................................... 358
8.4.4. Models ................................................................................................................................. 361
8.4.5. Materials .............................................................................................................................. 362
8.4.6. Cell Zone Conditions ............................................................................................................ 364
8.4.7. Boundary Conditions ............................................................................................................ 366
8.4.8. Solution ............................................................................................................................... 374
8.4.9. Postprocessing ..................................................................................................................... 378
8.4.10. Iterate for Higher Pixels ....................................................................................................... 385
8.4.11. Iterate for Higher Divisions ................................................................................................. 389
8.4.12. Make the Reflector Completely Diffuse ............................................................................... 396
8.4.13. Change the Boundary Type of Baffle ................................................................................... 398
8.5. Summary ...................................................................................................................................... 399
8.6. Further Improvements .................................................................................................................. 399
9. Using a Non-Conformal Mesh ............................................................................................................. 401
9.1. Introduction ................................................................................................................................. 401
9.2. Prerequisites ................................................................................................................................. 401
9.3. Problem Description ..................................................................................................................... 402
9.4. Setup and Solution ....................................................................................................................... 403
9.4.1. Preparation .......................................................................................................................... 403
9.4.2. Mesh .................................................................................................................................... 404
9.4.3. General Settings ................................................................................................................... 408
9.4.4. Models ................................................................................................................................. 408
v
Release 16.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
of ANSYS, Inc. and its subsidiaries and affiliates.
Tutorial Guide
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