Consider the short MWE : import ufl import dolfinx as dfx from dolfinx.io import XDMFFile from mpi4py.MPI import COMM_WORLD with XDMFFile(COMM_WORLD, "mesh.xdmf", "r") as file: mesh = file.read_mesh(name="Grid") FE=ufl.FiniteElement("Lagrange",mesh.ufl_cell(),1) V = dfx.FunctionSpace(mesh,FE)…

The problem is that the interior cells in your mesh are not connected. This can be illustrated by running the following: import ufl import dolfinx as dfx from dolfinx.io import XDMFFile from mpi4py.MPI import COMM_WORLD import numpy as np from petsc4py import PETSc with XDMFFile(COMM_WORLD, "mesh.…

Trivial form fails on xdmf mesh

hawkspar May 20, 2022, 12:07pm 3

I’m pretty sure this problem is unrelated to this one since in my version of dolfinx dolfinx.fem.form is still a module.

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Trivial form fails on xdmf mesh

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