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-   -   Problems with polyDualMes (http://www.cfd-online.com/Forums/openfoam-meshing/119185-problems-polydualmes.html)

Christoph_84 June 11, 2013 12:39

Problems with polyDualMes
 
I tried to convert a mesh, generated in ICEM with approx. 5.5 Mio. tet cells


Code:

Overall number of cells of each type:
      hexahedra:    0
      prisms:        0
      wedges:        0
      pyramids:      0
      tet wedges:    0
      tetrahedra:    5465917
      polyhedra:    0

after running the polyDualMesh command I got approx. 21.9 Mio. hex cells, not one poly cell. I tried different angles (60 75 90) always with the same result.

Code:

Overall number of cells of each type:
      hexahedra:    21863668
      prisms:        0
      wedges:        0
      pyramids:      0
      tet wedges:    0
      tetrahedra:    0
      polyhedra:    0

Anyone an idea?

chegdan June 19, 2013 17:26

polyDualMesh (PDM) can be picky sometimes. You really need to have a high-quality tet mesh for PDM to work reliably. This also means it must be a tet mesh without Delaunay violations (slide 15). Without knowing more about your mesh, you will just be left with guesses or people throwing links to the forum like these:

http://www.cfd-online.com/Forums/ope...eneration.html

http://www.cfd-online.com/Forums/ope...e-help-me.html

http://www.cfd-online.com/Forums/ope...ce-object.html

maybe you can run a
Code:

checkMesh -allGeometry -allTopology
in your imported mesh to the OpenFOAM case for more information and/or provide your mesh.


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