Convert COMSOL mesh to FEniCS format

Question

Dear all,

What would be the preferred way to use a mesh generated in COMSOL in FEniCS?
I tried exporting it to bdf format, and convert to .msh in gmsh which is supported by dolfin-convert. However, when running it I get the error *** Unable to find cells of supported type.
How could I solve this?
If needed, I could upload the .bdf or .msh file.

Answer 1

What elements type are you using? Fenics only (at least for now, someone is working on this) supports interval, triangular and tetrahedral elements

Comments

Thank you for replying. When I look at the statistics in Gmesh it says it consists of 232297 tetrahedra, no hexahedra or other unsupported elements are shown there.

Answer 2

Hello,

I used to have a similar problem. My solution was to generate my mesh using gmsh and then import the mesh to dolfin using dolfin-convert mesh_file.msh mesh_file.xml .... This way you have a mesh that you can still use at COMSOL and also in FEniCS...
info about dolfin mesh converter: https://people.sc.fsu.edu/~jburkardt/py_src/dolfin-convert/dolfin-convert.html

Comments

Thanks for replying, however I already have a mesh in COMSOL. I export it to .bdf and import it in Gmesh where I define some surfaces and then export to .msh. For some unknown reason dolfin-convert crashes when I run it giving the above error.