Is it possible to control the partitioning mesh when we solve a problem in parallel

General
1

Hi!

When we solve a problem in parallel, FEniCS usually seperate our mesh into several parts, each process will have one of them and do their work on the submesh, and I find that the mesh is usually divided randomly.
My problem is that can we divide the mesh manually? for example, if I have a rectangular mesh, I want to spilt it in half and have two processes such that each process have one half of the mesh.

Thanks in advance.

2

In doflinx, yes. See the test at dolfinx/test_mesh_partitioners.py at 7f42277b0bae5e6aeb5dc74eee94c85b616d3625 · FEniCS/dolfinx · GitHub for an example.

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3

Thanks for quick reply! I will read it. But is it only works in dofinx?

4

Unlikely to work in legacy DOLFIN because the design is different, but I haven’t looked for many years.