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create group for unv?

  • Pei-Ying Hsieh
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17 years 3 months ago #1345 by Pei-Ying Hsieh
create group for unv? was created by Pei-Ying Hsieh
Dear FEA experts:

I have a mesh file in UNV format (only nodes + elements, no CAD geometry). To use it for OpenFOAM, I need to select the face elements for each boundary conditions. Does anyone here know any pre-processor that can import mesh (Nastran or Abaqus or UNV format), allow one to select element faces, save the faces to groups, then, export to either OpenFOAM or UNV format?

Thanks!

phsieh2005
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17 years 3 months ago #1346 by Joël Cugnoni
Replied by Joël Cugnoni on topic Re:create group for unv?
Hi,

you can use either Salome Mesh module to import the UNV mesh - create groups and export back the UNV mesh. Then you import your mesh with ideasUnvToFoam (latest version 1.4 of openFoam uses the face groups to create \"patches\" for BC definition).

or

you directly use ideasUnvToFoam to import your mesh without \"patches\" and you use openFOAM \"patchTool\" or \"autoPatch\" to create your patches. You may need to edit the boundaryFaces file to remove \"defaultFaces\" afterwards, but it works.

Other possibilities exist but i don't have experience with them.

PS: in the future CAELinux 2007, you will find Salome-OpenFOAM tutorial describing this point.
Joël Cugnoni - a.k.a admin
www.caelinux.com
  • Pei-Ying Hsieh
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17 years 3 months ago #1347 by Pei-Ying Hsieh
Replied by Pei-Ying Hsieh on topic Re:create group for unv?
:blink:
Hi,

Thanks for the reply!

The difficulty I am facing is that, in the UNV mesh, there is no geometry associated with the mesh. The original geometry is complex, I cannot use the autoPatch tool in OpenFOAM to get the boundary faces correctly.

In Salome, is it possible to select all external face elements inside a specified box? And then, group them together? Or, can I use a mouse to click face elements to select, and then, put it in a group?

phsieh2005
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