I’ve saved an XDMF file of a mesh with a function assigned to each point at certain times using time-stamps. Now, I’d like to read that file and retrieve the values of that function at each saved time. Is this possible? I’m using dolfinx. The code for writing the file goes as follows: #Function s…

I needed something similar for a nonlinear solid mechanics problem (I only show the relevant lines below): u_file = XDMFFile(MPI.COMM_WORLD, "displacement.xdmf", "w") u_file.write_mesh(msh) for n in range(1, 10): num_its, converged = solver.solve(u) u_file.write_function(u, n)

Thanks for the help. :smiley: I found that meshio could do the trick (had to make sure points where mapped properly from the original mesh when passing to dolfinx, though).

Yeah I just ran across a similar issue ; dolfinx is sometimes inconsistent with mesh partitioning. What I observed on my end : Read a .xxx file (using meshio) Convert it to .xdmf (meshio) Read it back (dolfinx) Save its partition (which part of the mesh is owned by what processor) (dolfinx) Do stu…

An even simpler case of inconsistency can be seen here: import ufl from dolfinx.io import XDMFFile from dolfinx.fem import FunctionSpace, Function from mpi4py.MPI import COMM_WORLD as comm for i in range(2): with XDMFFile(comm, "mesh.xdmf", "r") as file: mesh = file.read_mesh(name="Grid") FE_…

Hello, I am trying to read back the xdmf like: io = PetscBinaryIO.PetscBinaryIO(complexscalars=True) f = io.readBinaryFile( "mesh.xdmf") But I get the error: objecttype = self._classid[header] ~~~~~~~~~~~~~^^^^^^^^ KeyError: 1010792557 During handling of the above exception, another exception…

Make a minimal reproducible example in a new topic.

Reading back XDMF file with time stamps on dolfinx

dolfinx

dokken September 11, 2022, 12:33pm 3

I would suggest using petsc directly: I/O from XDMF/HDF5 files in dolfin-x - #23 by hawkspar

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Reading back XDMF file with time stamps on dolfinx

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