CFD Online Discussion Forums - [mesh manipulation] Problems with polyDualMes

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- - [mesh manipulation] Problems with polyDualMes (https://www.cfd-online.com/Forums/openfoam-meshing/119185-problems-polydualmes.html)

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?

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.