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ANSYS ICEM CFD 网格划分教程1

AutoHexa Tutorial Manual

Version 4.2

March 2002

? 2002 by ICEM CFD Engineering

All other products or name brands are trademarks of their respective holders.

ICEM CFD Engineering

2855 Telegraph Avenue

Suite 501

Berkeley, CA 94705

https://www.wendangku.net/doc/d015980513.html,

info@https://www.wendangku.net/doc/d015980513.html,

iii

Version 4.2AutoHexa Tutorial Manual

ICEM CFD Engineering

Table of Contents

Getting Started xi Tutorial Example 1.1: Modeling and Meshing a Room 1

1.1.1:Starting the Project (2)

1.1.2:Menus and Windows (3)

1.1.3:Creating Objects (4)

1.1.4:Mesh Generation (15)

Tutorial Example 1.2: Modeling and Meshing a Subway Station 23

1.2.1:Starting the Project (24)

1.2.2:Creating Objects (24)

1.2.3:Copying Objects (27)

1.2.4:Creating Objects (28)

1.2.5:Creating Groups of Objects (30)

1.2.6:Creating Polygons (32)

1.2.7:Creating Quads (35)

1.2.8:Mesh Generation (38)

Tutorial Example 1.3: Modeling and Meshing a Chemical Vapor Deposition Reactor 43

1.3.1:Starting the Project (44)

1.3.2:Model Creation (44)

1.3.3:Copying Objects (47)

1.3.4:Creating Objects (49)

1.3.5:Mesh Generation (52)

Tutorial Example 1.4: Modeling and Meshing a Lab 57

1.4.1:Starting the Project (58)

1.4.2:Creating Objects (59)

ICEM CFD Engineering AutoHexa Tutorial Manual Version 4.2

1.4.3:Copying Objects (62)

1.4.4:Creating Objects (64)

1.4.5:Creating Groups of Objects (66)

1.4.6:Creating Objects (67)

1.4.7:Moving Objects (69)

1.4.8:Mesh Generation (72)

1.4.9:The Tetra Mesh (73)

1.4.10:Configuration Options (73)

1.4.11:Hardcopy Creation (75)

1.4.12:Summary Creation (77)

Tutorial Example 1.5: Modeling and Meshing a Wing 79

1.5.1:Starting the Project (80)

1.5.2:Creating Objects (80)

1.5.3:Copying Objects (86)

1.5.4:Creating Objects (87)

1.5.5:Copying Objects (88)

1.5.6:Creating Objects (88)

1.5.7:Mesh Generation (90)

1.5.8:Creating a Cut Plane (92)

Tutorial Example 1.6: Buildings 95

1.6.1:Starting the Project (96)

1.6.2:Creating the Objects (96)

1.6.3:Copying Objects (99)

1.6.4:Creating Objects (102)

1.6.5:Copying Objects (105)

1.6.6:Creating Objects (107)

1.6.7:Copying Objects (109)

1.6.8:Creating Groups (111)

1.6.9:Creating Objects (114)

1.6.10:Creating Groups (115)

1.6.11:Creating Objects (117)

1.6.12:Creating Groups (122)

1.6.13:Creating Objects (123)

1.6.14:Creating Groups (126)

Version 4.2AutoHexa Tutorial Manual

ICEM CFD Engineering

1.6.15:Copying Objects (128)

1.6.16:Generating the Mesh (130)

Tutorial Example 1.7: Inside of an Automobile 133

1.7.1:Starting the Project (134)

1.7.2:Creating the Objects (134)

1.7.3:Creating a Group (141)

1.7.4:Copying Objects (142)

1.7.5:Creating Objects (144)

1.7.6:Copying Objects (146)

1.7.7:Generating the Mesh (148)

Tutorial Example 1.8: Modeling and Meshing a Tank 151

1.8.1: Starting the Project (152)

1.8.2:Menus and Windows (153)

1.8.3:Creating Objects (154)

1.8.4:Mesh Generation (159)

Tutorial Example 1.9: Modeling and Meshing a Distribution System 163

1.9.1:Starting the Project (164)

1.9.2:Creating Objects (164)

1.9.3:Copying Objects and creating groups (166)

1.9.4:Mesh Generation (168)

ICEM CFD Engineering AutoHexa Tutorial Manual Version 4.2

vii Introduction of Operations in the Examples

Tutorial Example 1.1: Modeling and Meshing a Room (1)

?Accessing AutoHexa

?Set-up of the AutoHexa windows

?Functionalities within AutoHexa

?Project

?Functionalities of the mouse

?Creating Domain, Hexas, Cylinders, Quads, and Circles

?Hexa mesh generation

?Using Cut plane to define a mesh plane

?Using Boundary Conditions Settings

?Left mouse button: Rotates the model about the X, Y and Z axes

?Middle mouse button: Move or translate the viewpoint

?Right mouse button: Zoom in/out and rotate about X,Y and Z

axes

Tutorial Example 1.2: Modeling and Meshing a Subway Station (23)

?Initializing AutoHexa and beginning the project

?Using Domain and Hexa to create the basic model

?Utilization of the Copy function to copy created objects

?Placing Cylinders together into groups

?Using Polygons to create stairs

?Generating Hexa mesh

?Utilizing Cut planes and Per-object parameters

?Generating Tetra mesh

Tutorial Example 1.3: Modeling and Meshing a Chemical Vapor Deposition Reactor (43)

?Initializing AutoHexa and beginning the project

?Creating the model using Domain, Hexas, Cylinders, and Cir-

cles

?Copying Cylinders to further create cylinders for the model

viii

?Implementing the Cartesian grid type for grid generation

?Utilizing Cut plane and Display mesh to display the mesh Tutorial Example 1.4: Modeling and Meshing a Lab (57)

?Initializing AutoHexa and beginning the project

?Developing the model, utilizing Domain, Hexas, Cylinders,

Polygons, Circles and Quads

?Creating multiple entities by copy ing previously created geom-

etry

?Placing multiple objects into one Group, easing the copy ing

process

?Utilizing the Move function to translate geometrical entities into

new locations

?Generating Hexa mesh

?Modifying the Per-object params

?Generating Tetra mesh

?Altering the Minimum object separation

?Sorting the object edit lists, Alphabetically

?Doing Annotation, adding markers and getting a hardcopy of

the model

?Accessing a summary of the specifications used in the creation

of the model

Tutorial Example 1.5: Modeling and Meshing a Wing (79)

?Initializing AutoHexa and beginning the project

?Developing the model with the following geometrical entities:

Domain, Ellipsoidal cylinders, Ellipsoids, Polygons and

Quads

?Making modifications in the Copy window, copying the poly-

gons

?Creating Tetra mesh

?Utilizing Cut plane techniques to obtain a clearer view of the tet-

ra mesh around the wing

Tutorial Example 1.6: Buildings (95)

?Initializing AutoHexa and beginning the project

?Developing the model, utilizing Domain, Hexas, Cylinders,

Quads and Polygons

?Creating multiple entities by copy ing previously created geom-

etry

?Placing multiple objects into one Group, easing the copy ing

process

?Creating Hexa mesh.

Tutorial Example 1.7: Inside of an Automobile (133)

?Developing the model, utilizing Domain, Hexas, Cylinders,

Quads, and Polygons

?Creating multiple entities by copy ing previously created geom-

etry

?Placing multiple objects into one Group, easing the copy ing

process

?Creating tetra mesh

Tutorial Example 1.8: Modeling and Meshing a Tank (151)

?Accessing AutoHexa

?Set-up of the AutoHexa windows

?Functionalities within AutoHexa

?Project

?Functionalities of the mouse

?Creating Pipes

?Changing the radius and default radius

?Hexa mesh generation

?Left mouse button: Rotates the model about the X and Y axis

?Middle mouse button: Move or translate the viewpoint

?Right mouse button: Zoom in/out and rotate about Z axis Tutorial Example 1.9: Modeling and Meshing a Distribution System (163)

?Initializing AutoHexa and beginning the project

?Using Domain to create the basic model

?Utilization of the Copy function to copy created objects

?Placing Pipes together into Groups

?Changing the radius and default radius

?Generating Hexa mesh

Version 4.2AutoHexa Tutorial Manual

ICEM CFD Engineering

Getting Started

Overview of AutoHexa

AutoHexa is a modeling and meshing module of ICEM CFD that

combines a simple model builder with a fully-automatic

hexahedral, tetrahedral, and Cartesian mesh generator for most

Cartesian geometries.

The following objects may all be created and automatically meshed

using the AutoHexa modeling system:

1.Blocks that are aligned with the coordinate axes.

2.Cylinders, truncated cones, and polygonal prisms whose ends

are parallel to the coordinate axes.

3.Inclined planes with an optional thickness.

4.Circular and rectangular flat objects.

5.Ellipsoids, ellipsoidal cylinders and wire objects.

Tutorial Examples

In each example in this tutorial manual, the steps needed to build

the model are described in detail. Some suggestions on how to

control the mesh in important areas of the model are also given.

Most features of the program are illustrated at least once in the

tutorial examples. For further information, the user may refer to the

ICEM CFD AutoHexa Online Help Manual.

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ICEM CFD Engineering AutoHexa Tutorial Manual Version 4.2

Version 4.2AutoHexa Tutorial Manual

ICEM CFD Engineering

Tutorial Example 1.1: Modeling and Meshing a Room

Overview This tutorial will guide the user towards creating a model of an

office room that will be used to analyze airflow. Ventilation ducts

located on the walls will supply air to the room, while exit vents

located on the ceiling will release air from the room. The air that

enters the room has to travel through the room, around the

furniture, and to the exit vents.

This simulation will enable the user to understand the flow

distribution inside the room, as well as guide the user in placing the

ventilation ducts to provide optimal comfort to the occupant.

Operations introduced by this example Menus and Windows

Accessing AutoHexa

?Set-up of the AutoHexa windows ?Functionalities within AutoHexa

Starting a New Project

?Project

?Functionalities of the mouse

2Modeling and Meshing a Room

ICEM CFD Engineering AutoHexa Tutorial Manual Version 4.2

Creating Objects

?Creating Domain, Hexas, Cylinders, Quads, and Circles

Mesh Generation

?Hexa mesh generation

?Using Cut plane to define a mesh plane

Setting Boundary Conditions

?Using Boundary Conditions Settings

1.1.1: Starting the Project

1.Load ICEM CFD to open the main Mesh Editor viewing

screen, as well as the MED messages window and the Display

window. A File Selection window should also appear, with the

prompt to Select an ICEM CFD project to open . Refer to Fig-

ure 1.1.1.

Figure 1.1.1:

The Mesh Editor

viewing screen, the

MED messages

window, the Display

window, and the

Select project

window.

2.Enter the project name as tutorial-1 and press Accept .

Modeling and Meshing a Room3

Version 4.2AutoHexa Tutorial Manual

ICEM CFD Engineering

3.Meshing > AutoHexa will initialize the AutoHexa modeling

system.

1.1.2: Menus and Windows

1.Once in AutoHexa, the display seen in Figure 1.1.2 will

appear:

Figure 1.1.2:

The AutoHexa start-

up screen

Above window is displayed on the screen. All input/output and

modeling functions are accessible through the AutoHexa window.

All interactions with the program are printed in the AutoHexa

messages frame at the bottom left corner. The Save button in the

AutoHexa messages frame will only save the information from

this window. The vertical frame on the right depicts the tree for the

object creation. This is also used during the process of editing

standard objects.

2. A blue block will already be located in the center of the Auto-

Hexa viewing window. This is the initial Domain. All of the

objects, or geometry, are created within this domain.

4Modeling and Meshing a Room

ICEM CFD Engineering AutoHexa Tutorial Manual Version 4.2

By using the mouse, the user may change the viewpoint of the

model.

Left mouse button : Rotates the model about the X , Y and Z axes ?

Middle mouse button : Move or translate the viewpoint ?Right mouse button : Zoom in/out and rotate about X,Y and

Z axes

Note: Throughout the tutorials, it is assumed that the user is

employing a three-button mouse. If the user is utilizing a two-button mouse, press the right mouse button to perform the middle mouse button functions. Pressing the left and right mouse button simultaneously will perform the right mouse button functions.

1.1.3: Creating Objects

In this section, the user will create the following objects: Domain,

Hexas, Cylinders, Quads , and Circles . The Domain represents

the territory of the room. Several obstructions will be created and

placed within this room: desks, tables, and shelves. Ventilation duct

inlets and outlets will also be placed on the walls and ceiling of the

room.

The room furniture will be modeled using the standard objects

available under the Model menu of the AutoHexa viewing

window. In Autohexa , every object is always aligned with the

coordinate axes. The user should refer to the reference manual for a

more detailed description of each object.

Creating the Domain

1.To resize the room, the user must first modify the default

Domain size. Select Domain from the AutoHexa right side

tree structure.

2.In the Edit frame located on the bottom right position on the

screen, change the values of the E ndpoints -- xE, yE, and zE --

to (7, 3, 5), respectively. Refer to Figure 1.1.3.

Modeling and Meshing a Room 5

Version 4.2AutoHexa Tutorial Manual

ICEM CFD Engineering

Figure 1.1.3:

Modifying the

Domain parameters

3.Press Apply to activate the changes.

4.Select Orient > Isometric view to view the entire Domain .

(Figure 1.1.4). The boundaries of the Domain are adiabatic

walls by default.

Figure 1.1.4:

The isometric view of

the modified

Domain .

Creating the Hexas

The user will create the following Hexa type objects:

The Book-shelf

1.Click Create hexas icon from the top icon bar. A default hexa

will appear at the center of the domain, as seen in Figure 1.1.5.

Select hexa.1

from tree.

6Modeling and Meshing a Room

ICEM CFD Engineering AutoHexa Tutorial Manual Version 4.2Figure 1.1.5:

The default hexa that

appears.

2.The attributes of hexa.1 may be modified through the Edit

frame. Begin by changing the name of hexa.1 to book-shelf in

the Name field.

3.Adjust the size of the book-shelf by changing the x, y, and z

S tarting and E nd points to (0, 0, 0) and (0.8, 2.5, 1.5), respec-

tively. Refer to Figure 1.1.6.

Figure 1.1.6:

Assignment of the

values for book-shelf

Since calculations will not be performed inside the object, the

object type in this case is hollow . From Type select hollow .

Please refer to the Online Manual for further explanation of

object types.

5.Click Apply to initialize the changes. The book-shelf shown in

Figure 1.1.7 has now been created.

Modeling and Meshing a Room 7Version 4.2AutoHexa Tutorial Manual

ICEM CFD Engineering

Figure 1.1.7:

The book-shelf

created with hexas .

Note: Other objects should be created with a similar approach. Begin by selecting Object types from the icons. They can be edited by selecting Edit object after pressing right mouse button on the specific object in the right side tree structure. (Since the families do not need to be modified, it is not necessary to make changes this way. All changes may be made in the normal edit frame at the bottom right position) The following instructions should be used to create desk1, desk2, and desk3. The desk11.Select Create hexas icon to create another hexa 2.Change the Name from hexa.1 to desk13.S tart points: (5.4, 0, 0)4.E nd points: (2.3, 0.75, 1)5.Type : hollow (Press the left mouse button in the Type field to choose among solid, hollow, or fluid )Note: Click Apply to confirm the changes.The desk21.Select Create hexas icon to create another hexa 2.Change the Name to desk23.S tart points:

(0, 0, 2.2)

ICEMCFD网格划分入门基础

WorkBench ICEM CFD 网格划分入门 111AnsysWB里集成了一个非常重要的工具：ICEM CFD。它是一个建模、划分网格的集成工具，功能非常强大。我也只是蜻蜓点水的用了几次，感觉确实非常棒，以前遇到复杂的模型，用过几个划分网格的工具。但这是我觉得最方便和最具效率的。网格划分很大程度上影响着后续的仿真分析——相信各位都有所体会。而ICEM CFD特别长于划分六面体网格，相信无论是结构或流体（当然铁别是流体），都会得益于它的威力。 ICEM CFD建模的能力不敢恭维，但划分网格确实有其独到之处。教程开始前，作一个简单的原理介绍，方面没有使用过ICEM CFD的朋友理解主要的任务： 111如下图： 1：白色的物体是我们需要划分网格的，但是它非常不规则。 2：这时候你一定想：怎么这个不规则呢，要是它是一个方方正正的形状多好（例如红色的那个形状）01 111于是有了这样一种思想： 1：对于异型，我们用一种规则形状去描述它。 2：或者说：如果目标形状非常复杂，我们就用很多规则的，简单的形状单元合成在一起，去描述它。之后，将网格划分的设置，做到规则形状上。最后，这些规则，通过最初的“描述”关系，自动的“映射”到原先的复杂形状上——问题就得到了解决！！！ ICEM CFD正是使用了这种思想。如下是一个三通管，在ProE里做得

02 在ProE里面直接启动WB 进入WB后，选择如下图： 03 111如下： 1：代表工作空间里的实体 2：代表某实体的子实体，可以控制它们的开关状态3：控制显示的地方

04 下面需要创建一个Body实体这个实体代表了真实的物体。这个真实的物体的外形由我们导入的外形来定义。 ——我们导入的外形并不是真实的实体。这个概念要清楚。但是今后基本上不会对这个真实的实体作什么操作。这种处理方式主要是为工作空间内有多个物体的时候准备的。 05 1：点击“创建Body” 2、3：点选这两个点 4：于是创建出一个叫“Body”的实体操作中，左键选择，中键确认，右键完成并退出——类似的操作方法很多地方用到，要多练习，今后

ICEM CFD教程

ICEM CFD教程四面体网格 ?对于复杂外形，ICEM CFD Tetra具有如下优点： ?根据用户事先规定一些关键的点和曲线基于8叉树算法的网格生成，生成速度快，大约为1500 cells/second ?无需表面的三角形划分，直接生成体网格 ?四面体网格能够合并到混合网格中，并实施平滑操作 ?单独区域的粗化和细化 ?ICEM CFD的CAD(CATIA V4, UG, ProE, IGES, and ParaSolid, etc)接口，保留有CAD几何模型的参数化描述，网格可以在修改过的几何模型上重新生成这是生成的燃烧室四面体网格，共有660万网格，生成时间约为50分钟 ?八叉树算法 Tetra网格生成是基于如下的空间划分算法：这种算法需要的区域保证必要的网格密度，但是为了快速计算尽量采用大的单元。 1.在几何模型的曲线和表面上规定网格尺寸 2.构造一个初始单元来包围整个几何模型 3.单元被不断细分来达到最大网格尺寸（每个维的尺寸按照1/2分割，对于三维就是 1/8）

4.均一化网格来消除悬挂网格现象 5.构造出最初的最大尺寸单元网格来包围整个模型 6.节点调整以匹配几何模型形状 7.剔除材料外的单元 8.进一步细分单元以满足规定的网格尺寸要求 9.通过节点的合并、移动、交换和删除进行网格平滑，节点大小位于最大和最小网格尺寸之间

? 非结构化网格的一般步骤 1. 输入几何或者网格所有几何实体，包括曲线、表面和点都放在part 中。通过part 用户可以迅速打开/关掉所有实体，用不同颜色区分，分配网格，应用不同的边界条件。几何被收录到通用几何文件.tin 中，.tin 文件可以被ANSYS ICEM CFD’s 所有模块 1.1输入几何体Import Geometry ? 第三方接口文件：ParaSolid 、STEP 、IGES 、DWG 、GEMS 、ACIS … ? 直接接口：Catia 、Unigraphics 、Pro/E 、SolidWorks 、I-deas… 几何变化网格可以直接随之变化

ICEM 基础教程

第一章介绍 ICEM CFD 工程 Tutorials目录中每个工程是一个次级子目录。每个工程的目录下有下列子目录：import, parts, domains, mesh, 和transfer。他们分别代表： ? import/: 要导入到ICEMCFD中的集合模型交换文件，比如igs，STL等； ? parts/: CAD模型 ? domains/: 非结构六面体网格文件(hex.unstruct), 结构六面体网格分区文件(domain.n), 非结构四面体网格文件(cut_domain.1) ? mesh/: 边界条件文件(family_boco, boco)，结构网格的拓扑定义文件(family_topo, topo_mulcad_out), 和Tetin几何文件(tetin1). ? transfer/: 求解器输入文件(star.elem), 用于Mom3d.的分析数据 mesh目录中Tetin文件代表将要划分网格的几何体。包含B-spline曲面定义和曲线信息，以及分组定义 Replay 文件是六面体网格划分的分块的脚本鼠标和键盘操作

第二章ICEM CFD Mesh Editor界面 The Mesh Editor, 创建修改网格的集成环境，包含三个窗口 ? The ICEM CFD 主窗口 ? 显示窗口 ? The ICEM CFD 消息窗口主窗口主窗口中除了图形显示区域，外，还有6个radio按钮：File, Geometry, Meshing, Edit Mesh and Output. The File Menu The File menu 包含 ? Open, Save, Save as, Close, Quit, Project dir, Tetin file, Domain file, B.C file, Import geo, Export geo, Options, Utilities, Scripting, Annotations, Import mesh, DDN part.

ANSYS ICEM CFD中文教程

ANSYS.ICEM-CFD中文教程 ICEM CFD 工程 Tutorials目录中每个工程是一个次级子目录。每个工程的目录下有下列子目录：import, parts, domains, mesh, 和transfer。他们分别代表： ? import/: 要导入到ICEMCFD中的集合模型交换文件，比如igs，STL等； ? parts/: CAD模型 ? domains/: 非结构六面体网格文件(hex.unstruct), 结构六面体网格分区文件(domain.n), 非结构四面体网格文件(cut_domain.1) ? mesh/: 边界条件文件(family_boco, boco)，结构网格的拓扑定义文件(family_topo, topo_mulcad_out), 和Tetin几何文件(tetin1). ? transfer/: 求解器输入文件(star.elem), 用于Mom3d.的分析数据 mesh目录中Tetin文件代表将要划分网格的几何体。包含B-spline曲面定义和曲线信息，以及分组定义 Replay 文件是六面体网格划分的分块的脚本鼠标和键盘操作

ICEM CFD 基础教程

有redhong731@https://www.wendangku.net/doc/d015980513.html,提供版权所有,如有雷同…. 第一章介绍 ICEM CFD 工程 Tutorials目录中每个工程是一个次级子目录。每个工程的目录下有下列子目录：import, parts, domains, mesh, 和transfer。他们分别代表： ? import/: 要导入到ICEMCFD中的集合模型交换文件，比如igs，STL等； ? parts/: CAD模型 ? domains/: 非结构六面体网格文件(hex.unstruct), 结构六面体网格分区文件(domain.n), 非结构四面体网格文件(cut_domain.1) ? mesh/: 边界条件文件(family_boco, boco)，结构网格的拓扑定义文件(family_topo, topo_mulcad_out), 和Tetin几何文件(tetin1). ? transfer/: 求解器输入文件(star.elem), 用于Mom3d.的分析数据 mesh目录中Tetin文件代表将要划分网格的几何体。包含B-spline曲面定义和曲线信息，以及分组定义 Replay 文件是六面体网格划分的分块的脚本鼠标和键盘操作

ANSYS ICEM CFD 网格划分教程1

AutoHexa Tutorial Manual Version 4.2 March 2002

ii ? 2002 by ICEM CFD Engineering All Rights Reserved. No part of this document may be reproduced or used in any form otherwise without express permission from ICEM CFD Engineering. All other products or name brands are trademarks of their respective holders. ICEM CFD Engineering 2855 Telegraph Avenue Suite 501 Berkeley, CA 94705 https://www.wendangku.net/doc/d015980513.html, info@https://www.wendangku.net/doc/d015980513.html,

iii Version 4.2AutoHexa Tutorial Manual ICEM CFD Engineering Table of Contents Getting Started xi Tutorial Example 1.1: Modeling and Meshing a Room 1 1.1.1:Starting the Project (2) 1.1.2:Menus and Windows (3) 1.1.3:Creating Objects (4) 1.1.4:Mesh Generation (15) Tutorial Example 1.2: Modeling and Meshing a Subway Station 23 1.2.1:Starting the Project (24) 1.2.2:Creating Objects (24) 1.2.3:Copying Objects (27) 1.2.4:Creating Objects (28) 1.2.5:Creating Groups of Objects (30) 1.2.6:Creating Polygons (32) 1.2.7:Creating Quads (35) 1.2.8:Mesh Generation (38) Tutorial Example 1.3: Modeling and Meshing a Chemical Vapor Deposition Reactor 43 1.3.1:Starting the Project (44) 1.3.2:Model Creation (44) 1.3.3:Copying Objects (47) 1.3.4:Creating Objects (49) 1.3.5:Mesh Generation (52) Tutorial Example 1.4: Modeling and Meshing a Lab 57 1.4.1:Starting the Project (58) 1.4.2:Creating Objects (59)