ANSYS CFX 12.0官方教程详解：学习指南

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本篇教程是关于ANSYS CFX 12.0的官方指南，由ANSYS, Inc.发布于2009年4月。ANSYS是一家全球知名的工程仿真软件公司，专注于提供流体动力学、电磁学、结构力学等领域的解决方案。CWX 12.0版本是该公司在CFX（Computational Fluid Dynamics）产品线中的一个重要里程碑，它旨在帮助用户深入理解和掌握CFX技术，进行高效精确的流体动力学模拟。该教程详细介绍了如何使用CWX 12.0进行复杂工程问题的分析，包括但不限于网格生成、边界条件设定、求解流程控制以及后处理结果解读。它涵盖了从基本操作到高级应用的广泛内容，适合不同水平的用户，从初学者到经验丰富的工程师都能从中获益。教程中包含了认证信息，强调了版权和商标保护，表明所有内容未经许可不得复制或擅自使用，以确保知识产权的合法权益。同时，教程也列出了ANSYS及其相关品牌和产品的注册商标，如CFX、FLUENT、HFSS等，这些都是ANSYS在特定领域内的专业标志。此外，教程还包含免责声明，指出软件产品和文档中包含了ANSYS的商业秘密和专有技术，用户在使用过程中应严格遵守保密协议，尊重知识产权。软件的提供和使用都受严格的许可条款约束，确保合法合规的使用环境。总体而言，这是一份全面而深入的CWX 12.0官方教程，对于想要提升在CFX模拟技术上的专业能力的用户来说，是不可或缺的学习资料。无论是为了完成项目需求，还是为了个人技能提升，这份教程都提供了丰富的实践指导和技术支持。

Opening an Existing Simulation ...................................................................................................... 473

Editing the Boundary Conditions ..................................................................................................... 473

Creating a Domain Interface ........................................................................................................... 474

Writing the CFX-Solver Input (.def) File .......................................................................................... 474

Obtaining a Solution for the Simulation with Swirl using CFX-Solver Manager ....................................... 474

Viewing the Results for Simulation with Swirl in CFD-Post ................................................................. 475

Coal Combustion Simulation with Swirl and Nitrogen Oxide ................................................................ 476

Opening an Existing Simulation ...................................................................................................... 476

Editing the Domain ....................................................................................................................... 476

Writing the CFX-Solver Input (.def) File .......................................................................................... 477

Obtaining a Solution for the Simulation with Swirl and Nitrogen Oxide using CFX-Solver Manager ............ 477

Viewing the Results for the Simulation with Swirl and Nitrogen Oxide in CFD-Post ................................. 478

31. Steam Jet ............................................................................................................................................... 479

Tutorial Features .......................................................................................................................... 479

Overview of the Problem to Solve ................................................................................................... 479

Before You Begin ......................................................................................................................... 480

Starting CFX-Pre ......................................................................................................................... 480

Deﬁning a Case in CFX-Pre ........................................................................................................... 480

Importing the Mesh ...................................................................................................................... 481

Importing the Steam Jet CCL .......................................................................................................... 481

Creating a Steady State Analysis ..................................................................................................... 482

Creating and Loading Materials ...................................................................................................... 482

Creating the Domain ..................................................................................................................... 483

Creating Subdomains .................................................................................................................... 486

Creating Boundaries ..................................................................................................................... 490

Creating a Time Step Expression ..................................................................................................... 492

Setting Solver Control ................................................................................................................... 493

Writing the CFX-Solver Input (.def) File .......................................................................................... 493

Obtaining a Solution for Simulation using CFX-Solver Manager ........................................................... 493

Viewing the Results in CFD-Post .................................................................................................... 494

Displaying the Steam Molar Fraction ............................................................................................... 494

Displaying the Gas to Liquid Mass Transfer Rate ............................................................................... 494

Displaying the Liquid to Gas Mass Transfer Rate ............................................................................... 494

Displaying the Gas to Liquid and Liquid to Gas Phase Transfer Rates in Synchronous Views ...................... 495

Creating a Chart to Plot the False Time Step Along a Line .................................................................... 495

32. Fluid Flow and Heat Transfer in a Mixing Elbow ........................................................................................... 497

Create a Working Directory ............................................................................................................ 498

Launch ANSYS CFD-Post ............................................................................................................. 499

Display the Solution in ANSYS CFD-Post ........................................................................................ 502

View and Check the Mesh .............................................................................................................. 505

View Simulation Values using the Function Calculator ......................................................................... 508

Become Familiar with the Viewer Controls ........................................................................................ 509

Create an Instance Reﬂection ......................................................................................................... 511

Show Velocity on the Symmetry Plane .............................................................................................. 512

Show Flow Distribution in the Elbow ............................................................................................... 514

Show the Vortex Structure .............................................................................................................. 517

Compare a Contour Plot to the Display of a Variable on a Boundary ....................................................... 518

Chart Temperature vs. Distance ....................................................................................................... 520

Create a Table to Show Mixing ....................................................................................................... 524

Review and Modify a Report .......................................................................................................... 526

Create a Custom Variable and Animate the Display ............................................................................. 526

Loading and Comparing the Results to Those in a Reﬁned Mesh ........................................................... 528

Save Your Work ........................................................................................................................... 530

Generated Files ............................................................................................................................ 532

33. Turbo Postprocessing ............................................................................................................................... 533

Problem Description ..................................................................................................................... 533

Create a Working Directory ............................................................................................................ 534

Launching ANSYS CFD-Post ......................................................................................................... 535

xvi Contains proprietary and conﬁdential information of ANSYS, Inc. and its subsidiaries and afﬁliates.

ANSYS CFX Tutorials

List of Figures

2.1. Static Mixer with 2 Inlet Pipes and 1 Outlet Pipe ............................................................................................. 6

3.1. Static Mixer with 2 Inlet Pipes and 1 Outlet Pipe ............................................................................................ 30

5.1. Injection Mixing Pipe ............................................................................................................................... 68

7.1. External Air Flow Over a Generic Vehicle Body ............................................................................................. 96

9.1. Mesh around the bump ............................................................................................................................ 137

13.1. Shear Stress of a Shear-thickening Fluid .................................................................................................... 182

13.2. Apparent Viscosity of a Shear-thickening Fluid ........................................................................................... 182

14.1. Geometry subsection ............................................................................................................................. 194

17.1. Cut-away Diagram of the Mixer ............................................................................................................... 241

17.2. Impeller Mesh Region ........................................................................................................................... 242

18.1. Cut-away Diagram of the Airlift Reactor ................................................................................................... 260

23.1. Project setup for two-way FSI analysis ...................................................................................................... 342

24.1. Static Mixer with 2 Inlet Pipes and 1 Outlet Pipe ........................................................................................ 361

25.1. Modifying Control Points on the Hub Layer ............................................................................................... 384

25.2. Adding Edge Split Controls near the Leading Edge on the Hub Layer ............................................................. 385

25.3. Modifying Control Points on the Shroud Tip Layer ..................................................................................... 386

32.1. Problem Speciﬁcation ............................................................................................................................ 498

32.2. The Hexahedral Grid for the Mixing Elbow ............................................................................................... 506

32.3. Orientation Control Cursor Types ............................................................................................................. 510

32.4. Right-click Menus Vary by Cursor Position ................................................................................................ 511

32.5. Velocity on the Symmetry Plane .............................................................................................................. 513

32.6. Velocity on the Symmetry Plane (Enhanced Contrast) .................................................................................. 514

32.7. Vector Plot of Velocity ........................................................................................................................... 515

32.8. Streamlines of Turbulence Kinetic Energy ................................................................................................. 516

32.9. Absolute Helicity Vortex ........................................................................................................................ 518

32.10. Boundary Pressure vs. a Contour Plot of Pressure ...................................................................................... 520

32.11. Chart of Output Temperatures at the Outlet .............................................................................................. 522

32.12. Chart of Output Temperatures at Two Locations ........................................................................................ 524

32.13. Comparing Contour Plots of Temperature on Two Mesh Densities ................................................................ 529

32.14. Displaying Differences in Contour Plots of Temperature on Two Mesh Densities ............................................. 530

33.1. Problem Speciﬁcation ............................................................................................................................ 534

xix

Contains proprietary and conﬁdential information of ANSYS, Inc. and its subsidiaries and afﬁliates.