Table Of Content

FLUENT 6.3 Tutorial Guide September 2006 Copyright (cid:13)c 2006 by Fluent Inc. All Rights Reserved. No part of this document may be reproduced or otherwise used in any form without express written permission from Fluent Inc. Airpak, FIDAP, FLUENT, FLUENT for CATIA V5, FloWizard, GAMBIT, Icemax, Icepak, Icepro, Icewave, Icechip, MixSim, and POLYFLOW are registered trademarks of Fluent Inc. All other products or name brands are trademarks of their respective holders. CHEMKIN is a registered trademark of Reaction Design Inc. Portions of this program include material copyrighted by PathScale Corporation 2003-2004. Fluent Inc. Centerra Resource Park 10 Cavendish Court Lebanon, NH 03766 Volume 1 1 Introduction to Using FLUENT: Fluid Flow and Heat Transfer in a Mixing Elbow 2 Modeling Periodic Flow and Heat Transfer 3 Modeling External Compressible Flow 4 Modeling Unsteady Compressible Flow 5 Modeling Radiation and Natural Convection 6 Using a Non-Conformal Mesh 7 Using a Single Rotating Reference Frame 8 Using Multiple Rotating Reference Frames 9 Using the Mixing Plane Model 10 Using Sliding Meshes 11 Using Dynamic Meshes Volume 2 12 Modeling Species Transport and Gaseous Combustion 13 Using the Non-Premixed Combustion Model 14 Modeling Surface Chemistry 15 Modeling Evaporating Liquid Spray 16 Using the VOF Model 17 Modeling Cavitation 18 Using the Mixture and Eulerian Multiphase Models 19 Using the Eulerian Multiphase Model for Granular Flow 20 Modeling Solidiﬁcation 21 Using the Eulerian Granular Multiphase Model with Heat Transfer 22 Postprocessing 23 Turbo Postprocessing 24 Parallel Processing Contents 1 Introduction to Using FLUENT: Fluid Flow and Heat Transfer in a Mixing Elbow 1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Setup and Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Step 1: Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Step 2: Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 Step 3: Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11 Step 4: Boundary Conditions . . . . . . . . . . . . . . . . . . . . . . . . 1-13 Step 5: Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19 Step 6: Displaying the Preliminary Solution . . . . . . . . . . . . . . . . 1-28 Step 7: Enabling Second-Order Discretization . . . . . . . . . . . . . . . 1-39 Step 8: Adapting the Grid . . . . . . . . . . . . . . . . . . . . . . . . . . 1-46 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-58 2 Modeling Periodic Flow and Heat Transfer 2-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Setup and Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Step 1: Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Step 2: Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 i (cid:13)c FluentInc. September21,2006 CONTENTS Step 3: Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Step 4: Boundary Conditions . . . . . . . . . . . . . . . . . . . . . . . . 2-10 Step 5: Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13 Step 6: Postprocessing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25 Further Improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25 3 Modeling External Compressible Flow 3-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Setup and Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Step 1: Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Step 2: Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 Step 3: Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7 Step 4: Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . 3-8 Step 5: Boundary Conditions . . . . . . . . . . . . . . . . . . . . . . . . 3-9 Step 6: Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 Step 7: Postprocessing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31 Further Improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31 4 Modeling Unsteady Compressible Flow 4-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Setup and Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Step 1: Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 ii (cid:13)c FluentInc. September21,2006 CONTENTS Step 2: Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 Step 3: Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6 Step 4: Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8 Step 5: Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . 4-9 Step 6: Boundary Conditions . . . . . . . . . . . . . . . . . . . . . . . . 4-10 Step 7: Solution: Steady Flow . . . . . . . . . . . . . . . . . . . . . . . . 4-12 Step 8: Enable Time Dependence and Set Unsteady Conditions . . . . . 4-24 Step 9: Solution: Unsteady Flow . . . . . . . . . . . . . . . . . . . . . . 4-27 Step 10: Saving and Postprocessing Time-Dependent Data Sets . . . . . 4-30 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43 Further Improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43 5 Modeling Radiation and Natural Convection 5-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Setup and Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Step 1: Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 Step 2: Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 Step 3: Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-8 Step 4: Boundary Conditions . . . . . . . . . . . . . . . . . . . . . . . . 5-9 Step 5: Solution for the Rosseland Model . . . . . . . . . . . . . . . . . . 5-12 Step 6: Postprocessing for the Rosseland Model . . . . . . . . . . . . . . 5-15 Step 7: P-1 Model Setup, Solution, and Postprocessing . . . . . . . . . . 5-24 Step 8: DTRM Setup, Solution, and Postprocessing . . . . . . . . . . . . 5-28 Step 9: DO Model Setup, Solution, and Postprocessing . . . . . . . . . . 5-31 Step 10: Comparison of y-Velocity Plots . . . . . . . . . . . . . . . . . . 5-34 Step 11: Comparison of Radiation Models for an Optically Thick Medium . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-36 iii (cid:13)c FluentInc. September21,2006 CONTENTS Step 12: S2S Setup, Solution, and Postprocessing for a Non-Participating Medium . . . . . . . . . . . . . . . . . . . . . 5-38 Step 13: Comparison of Radiation Models for a Non-Participating Medium . . . . . . . . . . . . . . . . . . . . . 5-43 Step 14: S2S Deﬁnition, Solution and Postprocessing with Partial Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-45 Step 15: Comparison of S2S Models with and without Partial Enclosure . 5-49 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-50 Further Improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-50 6 Using a Non-Conformal Mesh 6-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 Setup and Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3 Step 1: Merging the Mesh Files . . . . . . . . . . . . . . . . . . . . . . . 6-3 Step 2: Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4 Step 3: Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7 Step 4: Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9 Step 5: Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . 6-10 Step 6: Boundary Conditions . . . . . . . . . . . . . . . . . . . . . . . . 6-10 Step 7: Grid Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-20 Step 8: Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22 Step 9: Postprocessing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-33 Further Improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-33 iv (cid:13)c FluentInc. September21,2006 CONTENTS 7 Modeling Flow Through Porous Media 7-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 Setup and Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 Step 1: Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3 Step 2: Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5 Step 3: Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-7 Step 4: Boundary Conditions . . . . . . . . . . . . . . . . . . . . . . . . 7-9 Step 5: Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14 Step 6: Postprocessing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-32 Further Improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-32 8 Using a Single Rotating Reference Frame 8-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 Setup and Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 Step 1: Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3 Step 2: Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5 Step 3: Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-6 Step 4: Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8 Step 5: Boundary Conditions . . . . . . . . . . . . . . . . . . . . . . . . 8-9 Step 6: Solution Using the Standard k-(cid:15) Model . . . . . . . . . . . . . . 8-13 Step 7: Postprocessing for the Standard k-(cid:15) Solution . . . . . . . . . . . 8-19 Step 8: Solution Using the RNG k-(cid:15) Model . . . . . . . . . . . . . . . . . 8-25 v (cid:13)c FluentInc. September21,2006 CONTENTS Step 9: Postprocessing for the RNG k-(cid:15) Solution . . . . . . . . . . . . . . 8-26 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-29 Further Improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-29 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-30 9 Using Multiple Rotating Reference Frames 9-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2 Setup and Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3 Step 1: Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3 Step 2: Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-6 Step 3: Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-7 Step 4: Boundary Conditions . . . . . . . . . . . . . . . . . . . . . . . . 9-8 Step 5: Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-13 Step 6: Postprocessing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-16 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-19 Further Improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-20 10 Using the Mixing Plane Model 10-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 Problem Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1 Setup and Solution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2 Step 1: Grid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3 Step 2: Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4 Step 3: Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-5 Step 4: Mixing Plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-7 vi (cid:13)c FluentInc. September21,2006

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