How to export from Paraview to ANSYS or any software for performing Meshing
 

Hello,

I have fluent case and data file loaded onto paraview.
I have done a basic operation in paraview to delete some portion of the domain.
Now I want to export this residual portion of domain into ANSYS or any meshing software for further meshing.

Can anyone hlep me how to do this.


Thanks in advance!
vidyadhar

[Moderator note: Quoting more details from another thread:]

Quick answer: My suggestion is that you export the surface of the iso-surface into an STL file and use that to remesh. In theory, you can export to STL in ParaView if you use this chain of filters:

• Contours (namely your iso-surface)
  • Extract surface
    • Triangulate

Then select the last entry (the Triangulate one) on the "Pipeline Browser" and in the menu File -> Save Data, choose the format STL.

You could also try to save it to CGNS... at least it should only write the boundary surface.

Re-pairing the STL file for meshing
 

Hello Brunos Santos,
I have followed the procedure described by you- from an iso-surface of volume fraction=0.5. I am attaching herewith the STL file saved from paraview (Note: three files are getting saved: one with 139kB, and the other two with 1 kB each).


But, I am facing problems in processing this STL file in either ICEM CFD(uncovered faces, single edge elements etc..) or ANSYS workbench (invalid facets, mesh is not watertight, self-intersecting, body contains non-manifold vetex etc).

I request any one on the forum to please describe the procedure for repairing/correcting the STL and make it suitable for meshing. If possible, can anyone share a video of the entire process.


If it is not possible to mesh the iso-surface, is there any fault with the mesh of my original domain?




Thanks & Regards,
Vidyadhar

Quick answer: The iso-surface is a single sheet, it's not a closed volume. The error messages you're are getting are likely due to that, namely that it's not a closed volume.

The only solution that comes to mind requires you to either work on the STL file using a 3D CAD editor, such as Blender, FreeCAD or MeshLab. There are plenty of online tutorials on how to use them.

Or use SpaceClaim, if your ANSYS installation provides it.

Either way, you will have to close the surface manually, namely to add the side surfaces of the tank, namely to add the missing parts of original walls of your original meshed domain.

Solution from discourse.paraview.org
 

Hello Brunos Santos,

Similar solution has been elaborately suggested by Kyoshimi (Kenichiro-Yoshimi) and Cory-Quammen from Paraview Community. The details can be found here: https://discourse.paraview.org/t/how...-software/2085 (particularly, Post #35,37 in this link would solve my problem)



Thanks & Regards,
Vidyadhar