ANSYS Meshing Application Introduction

2-1ANSYS, Inc. Proprietary© 2009 ANSYS, Inc. All rights reserved.

April 28, 2009Inventory #002645

Pipe Tee Mesh

Workshop 2.1

ANSYS MeshingApplication Introduction

Introduction to the ANSYS Meshing Application



Training ManualGoals

• This workshop will illustrate the use of the Automatic Meshing Method for a single body part

• The transfer of the mesh toFLUENT and CFX is also demonstrated




Training ManualSpecifying Geometry

1. Copy the pt.agdb file from the tutorial

files folder to your working directory

2. Start Workbench and double-click the

Mesh entry in the Component

Systems panel in the Toolbox

3. Right-click on Geometry in the Mesh

entry in the Project Schematic and

select Import Geometry/Browse

4. Browse to the pt.agdb file you

copied and click Open

5. Note that the Geometry entry in the

Project Schematic now has a green

check mark indicating that geometry

has been specified




Training ManualInitial Mesh

6. Double-click the Mesh entry in the

schematic or right-click and select Edit. This will open the Meshing

Application

7. *In the Meshing Options panel set the Physics Preference to CFD, the

Mesh Method to Automatic and press OK

8. Right click on Mesh and select Generate Mesh

9. Use the view manipulation tools and the axis triad to inspect the mesh

*Note: If you are using ANSYS V14.0 or more recent versions of ANSYS then

you will not see the Meshing Options panel at the start of ANSYS

Meshing. You will still be able to set the Physics Preference and insert

any Mesh Methods manually.

Based upon choice of physics (CFD), the Meshing Application has produced a mesh accommodating curvature, a reasonable sizing strategy and automatic selection of

optimal mesh methods with minimal user input. There are many ways in which the Meshing Application can control and improve the mesh. Some further mesh controls will now be demonstrated.




Training ManualNamed Selections

10.Set the Selection Filter to Faces

and select one of the pipe end

faces as shown. Right-click in the

Model View and choose Create

Named Selection. Enter velocity-

inlet-1 for the Selection Name

11.Repeat for the other two pipe end

faces using the naming as shown

12.The Named Selections just

created are listed in the Outline by

expanding Named Selections.

The names assigned here will be

transferred to the CFD solver so

the appropriate flow conditions

can be applied on these surfaces.

pressure-outlet

velocity-inlet-1velocity-inlet-2




Training ManualInflation

13.Select Mesh in the Outline and expand Inflation

in Details

14.Set Use Automatic Tet Inflation to Program

Controlled, leave other settings

15.Right click on Mesh and select Generate Mesh.

Note the inflation layers are grown from all

boundaries not assigned a Named Selection.

The thickness of the inflation layers is

calculated as a function of the surface mesh

and applied fully automatically.




Training ManualSection Planes

16.Orient the model by clicking on

the axis triad (+X Direction)

17.Click on the New Section Plane

icon in the menu bar. Left click,

hold and drag the cursor in the

direction of the arrow as

illustrated to create the Section

Plane

18.Created Section Planes are

listed (bottom left). Planes can

be individually activated using

the checkbox, deleted and

toggled between 3D element

view and 2D slice view. Try this

now (you will need to rotate the

model to see the cross-section)

After the Section Plane has been created the

Section Plane cursor tool will still be active. Left clicking in the viewport and dragging will slide the Section Plane along its axis.

Clicking on either side of the Plane tool will cut

the mesh on each side respectively. Clicking twice on one side will change the view to a planar slice.

When the position is finalized, select a view

manipulation tool




Training ManualMesh Statistics

19. If you expand the Statistics entry

under Mesh, it will summarize the

number of nodes and elements in

the mesh

20.Under Mesh Metric select

Skewness. Note the reported

mesh quality




Training ManualTransferring Mesh to CFD

21. After the mesh has been generated, you

can transfer it to a new CFD simulation

22. In the main Workbench Window, right click

on the Mesh entry in the Meshing instance

you created on the Project Schematic and

observe that you can transfer the mesh to

a new FLUENT or CFX simulation

(Transfer Data To New >). Select either

FLUENT or CFX

23. Note that the Mesh entry now has an

Update symbol, right click the Mesh entry

and select Update. This will pass data to

the new FLUENT/CFX instance.




Training ManualFluent with Workbench Mesh

24. If FLUENT was

selected - Double

click the Setup

entry and accept

the default options

in the FLUENT

Launcher

25. FLUENT will start

with the mesh

loaded

26. Save the project

from the

Workbench File

Menu




Training ManualCFX with Workbench Mesh

27. If CFX was

selected - Double

click the Setup

entry, CFX Pre will

launch with the

mesh loaded

28. Save the project

from the

Workbench File

Menu

ANSYS Meshing Application Introduction

Documents

Transcript of ANSYS Meshing Application Introduction