[Gmsh] Exporting dual mesh from GMSH

dimitri.tratkanov · January 6, 2016, 09:33

Hi,

With the help of gmsh I can calculate and visualize the dual mesh thanks to Mesh.Dual option (barycentric algorithm).

I need to know if it is possible to export the dual mesh from GMSH in .mesh file format ?

Dimitri

gridley2 · April 2, 2019, 16:05

Hi,

I'm interested as well since it looks like the dual mesh can sometimes be a good polyhedral mesh. Unfortunately it looks like the dual mesh often has a few concave cells, which would be problematic for CFD. So maybe exporting a tet mesh first, then recombining in OpenFOAM to a polyhedral mesh would be the best option here, using polyDualMesh. I imagine this tool would not merge cells which are due to become concave.

January 6, 2016, 09:33	Exporting dual mesh from GMSH	#1
dimitri.tratkanov New Member Dimitri Join Date: Jan 2016 Posts: 3 Rep Power: 10	Hi, With the help of gmsh I can calculate and visualize the dual mesh thanks to Mesh.Dual option (barycentric algorithm). I need to know if it is possible to export the dual mesh from GMSH in .mesh file format ? Dimitri

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April 2, 2019, 16:05		#2
gridley2 New Member Gavin Ridley Join Date: Jan 2019 Location: Tennessee, USA Posts: 25 Rep Power: 7	Hi, I'm interested as well since it looks like the dual mesh can sometimes be a good polyhedral mesh. Unfortunately it looks like the dual mesh often has a few concave cells, which would be problematic for CFD. So maybe exporting a tet mesh first, then recombining in OpenFOAM to a polyhedral mesh would be the best option here, using polyDualMesh. I imagine this tool would not merge cells which are due to become concave.