OpenFoam用户手册（中文翻译版）_小白-基于cfd

OpenFoam

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Open∇FOAM

The Open Source CFD Toolbox

User Guide

Version 2.3.0

5th February 2014

翻译：韩云龙

日期：2014 年 8 月

注：1、蓝色部分为个人标注

2、省略了部分章节内容

3、部分内容翻译不到位，请参考原文

第 1 章引言...............................................................................................................................1

第 2 章指导案例.......................................................................................................................1

2.1 盖驱动腔流 Lid-driven cavity flow...............................................................................2

2.1.1 前处理..................................................................................................................2

2.1.2 查看网格..............................................................................................................8

2.1.3 求解......................................................................................................................9

2.1.4 后处理..................................................................................................................9

2.1.5 增大网格分辨率（密度）Increasing the mesh resolution...............................12

2.1.6 网格分级介绍 Introducing mesh grading........................................................ 16

2.1.7 增加雷诺数.......................................................................................................19

2.1.8 高雷诺数流动...................................................................................................20

2.1.9 改变案例几何结构...........................................................................................22

2.1.10 后处理修正的几何结构.................................................................................24

2.2 带孔板的应力分析......................................................................................................25

2.2.1 网格生成............................................................................................................26

2.2.2 运行代码............................................................................................................32

2.2.3 后处理................................................................................................................32

2.2.4 练习....................................................................................................................34

2.3 水坝崩塌......................................................................................................................34

2.3.1 网格生成............................................................................................................35

2.3.2 边界条件............................................................................................................36

2.3.3 初始场设置........................................................................................................37

2.3.4 流体属性............................................................................................................38

2.3.5 紊流模型............................................................................................................38

2.3.6 时间步长控制....................................................................................................38

2.3.7 离散方法............................................................................................................39

2.3.8 线性求解器控制................................................................................................40

2.3.9 运行代码............................................................................................................40

2.3.10 后处理..............................................................................................................40

2.3.11 并行..................................................................................................................41

2.3.12 并行运算的后处理..........................................................................................42

第 3 章应用与库 Applications and libraries.......................................................................... 43

3.1 OpenFOAM 程序设计语言........................................................................................ 44

3.1.1 一般语言...........................................................................................................44

3.1.2 面向对象（Object-orientation）与 C++.......................................................... 44

3.1.3 方程表达............................................................................................................44

3.1.4 求解器代码........................................................................................................45

3.2 编译（Compiling）应用和库.....................................................................................45

3.2.1 头文件.H............................................................................................................45

3.2.2 使用 wmake 编译.............................................................................................. 46

3.2.3 删除依赖关系列表 wclean、rmdepall............................................................. 49

3.2.4 编译举例：pisoFoam........................................................................................49

3.2.5 调试信息和优化开关 Debug messaging and optimisation switches................52

3.2.6 将用户定义的库链接到已存在的应用............................................................52

3.3 运行应用......................................................................................................................52

3.4 并行运算......................................................................................................................53

3.4.1 网格和初始场数据的分解................................................................................53

3.4.2 运行分解的案例................................................................................................54

3.4.3 跨磁盘分解数据................................................................................................54

3.4.4 并行案例后处理................................................................................................55

3.5 标准求解器..................................................................................................................55

3.6 标准应用......................................................................................................................55

3.7 标准库..........................................................................................................................55

第 4 章 OpenFOAM 案例....................................................................................................... 55

4.1 案例的文件结构..........................................................................................................56

4.2 基本输入输出格式......................................................................................................56

4.2.1 通用语法规则....................................................................................................56

4.2.2 词库....................................................................................................................56

4.2.3 数据文件标题....................................................................................................57

4.2.4 列表....................................................................................................................57

4.2.5 标量，矢量与张量............................................................................................58

4.2.6 维量单位 Dimensional units............................................................................. 58

4.2.7 维数类型 Dimensioned types............................................................................59

4.2.8 场.......................................................................................................................59

4.2.9 指令和宏替换 Directives and macro substitutions........................................... 59

4.2.10 指令#include 和#inputMode........................................................................... 59

4.2.11 指令#codeStream.............................................................................................60

4.3 时间、数据的输入输出控制......................................................................................60

4.4 数值计算方法 Numerical schemes............................................................................. 61

4.4.1 插值方法 Interpolation schemes........................................................................62

4.4.2 表面法相梯度方法 Surface normal gradient schemes......................................63

4.4.3 梯度方法............................................................................................................64

4.4.4 拉普拉斯算子方法 Laplacian schemes............................................................ 64

4.4.5 离散方法 Divergence schemes..........................................................................64

4.4.6 时间方法............................................................................................................65

4.4.7 通量计算............................................................................................................65

4.5 求解和算法控制..........................................................................................................65

4.5.1 线性求解器控制................................................................................................66

4.5.2 亚松弛处理 Solution under-relaxation..............................................................67

4.5.3 PISO 和 SIMPLE 算法......................................................................................68

4.5.4 其他参数............................................................................................................69

第 5 章网格生成与转化...........................................................................................................69

5.1 网格描述......................................................................................................................69

5.1.1 网格规格和有效约束........................................................................................69

5.1.2 polyMesh 简介...................................................................................................70

III

5.1.3 cellShape 工具................................................................................................... 71

5.1.4 一维、二维及轴对称问题................................................................................72

5.2 边界 boundary..............................................................................................................73

5.2.1 指定边界面片类型............................................................................................73

5.2.2 base 类型............................................................................................................75

5.2.3 Primitive 类型...................................................................................................75

5.2.4 Derived 类型......................................................................................................76

5.3 使用 blockMesh 进行网格划分..................................................................................77

5.3.1 编写 blockMeshDict 文件.................................................................................77

5.3.2 多个块................................................................................................................80

5.3.3 创建少于 8 个顶点的块....................................................................................80

5.3.4 运行 blockMesh.................................................................................................81

5.4 使用 snappyHexMesh 生成网格.................................................................................81

5.4.1 snappyHexMesh 网格生成过程........................................................................81

5.4.2 创建背景六面体网格........................................................................................82

5.4.3 在特性边缘和表面拆分单元............................................................................82

5.4.4 移除单元............................................................................................................84

5.4.5 指定的区域的单元拆分....................................................................................84

5.4.6 贴合表面............................................................................................................85

5.4.7 网格层................................................................................................................86

5.4.8 网格质量控制....................................................................................................87

5.5 网格转化......................................................................................................................88

5.5.1 fluentMeshToFoam............................................................................................ 88

5.5.2～5.5.4 略...........................................................................................................89

5.6 mapFields 不同几何形状之间映射场........................................................................89

5.6.1 一致场的映射...................................................................................................89

5.6.2 非一致场的映射...............................................................................................89

5.6.3 映射并行案例...................................................................................................90

第 6 章后处理.........................................................................................................................90

6.1 paraFoam......................................................................................................................90

6.1.1 paraFoam 概述...................................................................................................90

6.1.2 Properties 面板.................................................................................................. 91

6.1.3 Display 面板...................................................................................................... 92

6.1.4 工具条...............................................................................................................92

6.1.5 视图操作...........................................................................................................93

6.1.6 等值线绘制........................................................................................................93

6.1.7 矢量绘制 Vector plots...................................................................................... 94

6.1.8 流线...................................................................................................................94

6.1.9 图像输出............................................................................................................94

6.1.10 动画输出..........................................................................................................94

6.2 Fluent 后处理.............................................................................................................. 94

6.3 Fieldview 后处理.........................................................................................................95

6.4 EnSight 后处理（略）................................................................................................96

6.5 数据取样......................................................................................................................96

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