What meshes are supported?

[NoelGK]

Hi,

I am considering to swap from the SfePy package to FEniCS to solve PDE problems so that I can find some more functionalities. I have some questions about the type of mesh formats and mesh kinds that are currently supported. I’d like to know if it is possible to import meshes created with gmsh, where I have labeled physical surfaces and volumes so that I can apply boundary conditions and different materials.

Thank you very much in advance,
Noel.

[dokken]

See for instance:
https://docs.fenicsproject.org/dolfinx/v0.6.0/python/demos/demo_gmsh.html
https://jsdokken.com/dolfinx-tutorial/chapter3/subdomains.html?highlight=read_from_msh#read-in-msh-files-with-dolfinx

Using the GMSH Python API to generate complex meshes

https://jsdokken.com/dolfinx-tutorial/chapter3/em.html

How to extract and use physical labels from GMSH surfaces on FEniCS (2D mesh)

@AMM Secondly, writing your mesh to xdmf as described in the next snippets works for me: import meshio msh = meshio.read("amm.msh") meshio.write("mesh.xdmf", meshio.Mesh(points=msh.points, cells={"triangle": msh.cells["triangle"]})) meshio.write("mf.xdmf", meshio.Mesh(points=msh.points, cells={"triangle": msh.cells["triangle"]}, cell_data={"triangle": {"name_to_read": msh.cell_data["triangle"]["gmsh:physical"]}})) from dolfin import * mesh = Mesh() with XD…

and various other posts explaining how to use GMSH with DOLFINx.