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Workshop 2.1

Pipe Tee Mesh

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2-33ANSYS, Inc. Proprietary© 2009 ANSYS, Inc. All rights reserved.

April 28, 2009Inventory #002645

Introduction to the ANSYS Meshing Application

Training ManualGoals

• This workshop will illustrate the use of the Automatic Meshing M th d f i l b d tMethod for a single body part

• The transfer of the mesh toFLUENT d CFX i lFLUENT 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 Toolboxy p

3. Right-click on Geometry in the Mesh entry in the Project Schematic and select Import Geometry/Browseselect Import Geometry/Browse

4. Browse to the pt.agdb file you copied and click Open

5 N t th t th G t t i th5. Note that the Geometry entry in the Project Schematic now has a green check mark indicating that geometry h b ifi d



has been specified


Training ManualInitial Mesh

6. Double-click the Mesh entry in theschematic 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 axis9. Use the view manipulation tools and the axis triad to inspect the mesh

Based upon choice of physics (CFD), the Meshing Application has produced a meshaccommodating curvature, a reasonable sizing strategy and automatic selection ofoptimal mesh methods with minimal user input There are many ways in which theoptimal mesh methods with minimal user input. There are many ways in which theMeshing Application can control and improve the mesh. Some further mesh controls willnow be demonstrated.




Training ManualNamed Selections

10.Set the Selection Filter to Faces and select one of the pipe end

velocity-inlet-1velocity-inlet-2

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 showng g

12.The Named Selections just created are listed in the Outline by expanding Named Selections

pressure-outlet

expanding Named Selections. The names assigned here will be transferred to the CFD solver so the appropriate flow conditions



the appropriate flow conditions can be applied on these surfaces.


Training ManualInflation

13.Select Mesh in the Outline and expand Inflation in Details

14 Set Use Automatic Tet Inflation to Program14.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 allNote 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 meshcalculated 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

After the Section Plane has been created theSection Plane cursor tool will still be active. Leftclicking in the viewport and dragging will slide theS ti Pl l it i17.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

Section Plane along its axis.

Clicking on either side of the Plane tool will cutthe mesh on each side respectively. Clickingtwice on one side will change the view to a planarslice.direction of the arrow as

illustrated to create the Section Plane

18 C t d S ti Pl

When the position is finalized, select a viewmanipulation tool

18.Created Section Planes are listed (bottom left). Planes can be individually activated using th h kb d l t d dthe checkbox, deleted and toggled between 3D element view and 2D slice view. Try this

( ill d t t t th



now (you will need to rotate the model to see the cross-section)


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 y jobserve 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 entryUpdate 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 project26. Save the project from the Workbench File Menu



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



Documents

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