Extracting surface pressures from VWT to a text file

exx077

Hello,

 

I would like to export / output the surface pressures from a VWT CFD to a text file to be utilised in HyperMesh for a topology optimisation using Optistruct.

 

I believe I will need to use AcuSolve's AcuConsole to this.

From within AcuConsole I am to use AcuOut.

 

I am having trouble doing so.

Can someone offer some guidance.

 

 

Thank you in advance.

 

exx077

Hello,

 

To anyone that may come accross this post with the same issue.

 

To resolve this, I have been using the following method:

1. Create 2D HyperMesh (HM) shell

2. Export solver deck - CFD - Nastran (Fluent standard format)

3. Import into Virtual Wind Tunnel (VWT)

4. Set up CFD simulation, but do not move model, only move the wind tunnel, otherwise the nodal coordinates between VWT and HM will not correlate. If you need to rotate/angle your model in a particular way to the flow (which travels in the positive x direction on the XY plane), then you should do this in HM before exporting your solver deck file

5. Run CFD

6. Open HyperMesh and import .log file

7. Turn off all components other than the surfaces you wish to obtain to nodal pressures for

8. Open the 'Contour' panel, change the 'Result Type' to 'Pressure'. Click Apply

9. Click on the 'Results' drop down from the menu bar' - select 'Query'

10. Ensure 'nodal coordinates' and 'Contour (pressure)' are selected on the panel on the left hand side. Shift+drag to select all the desired nodes in the graphics area

11. Select export. Save the .csv file

12. Open this in excell, delete the first two rows. Export as a .txt file

13. Open the .txt file and ensure there are no commas seperating the values, if there are, then use the replace function and replace all commas with nothing (so they are deleted)

14. Open HyperMesh, go to the the Pressure panel. Select entities - elements - drag and select all surface elements. Select linear interpolation - file -> .txt file - search radius ~ 0.005 (if your units is in m). Nodes on face - drag and select all surface nodes. Select create.

 

Hope this helps

Thanks