# \#submesh

**URL:** https://fenicsproject.discourse.group/tag/submesh/32.md

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## [Solving 1D nonlinear mixed domain coupled PDE with MixedFunctionSpace API](https://fenicsproject.discourse.group/t/solving-1d-nonlinear-mixed-domain-coupled-pde-with-mixedfunctionspace-api/17874)

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**Author:** [@leoc](https://fenicsproject.discourse.group/u/leoc)\
**Replies:** 0\
**Last updated:** [July 2, 2025, 3:42pm UTC](https://fenicsproject.discourse.group/t/solving-1d-nonlinear-mixed-domain-coupled-pde-with-mixedfunctionspace-api/17874 "2025-07-02T15:42:05Z")

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Hello everyone, I am trying to assess the feasibility of implementing a set of coupled PDE to model (in 1 dimension) a solid-state battery based on previous work with a commercial software using dolfinx v0.9.0 and the M…

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## [Assembly of combination of facet and cell functions](https://fenicsproject.discourse.group/t/assembly-of-combination-of-facet-and-cell-functions/15463)

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**Author:** [@Psirus](https://fenicsproject.discourse.group/u/Psirus)\
**Replies:** 0\
**Last updated:** [August 7, 2024, 1:48pm UTC](https://fenicsproject.discourse.group/t/assembly-of-combination-of-facet-and-cell-functions/15463 "2024-08-07T13:48:31Z")

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I’m assembling interface contributions to two (or more) submeshes, closely following the helpful example from Jorgen Dokken: problem.py for working with submeshes There, the forms containing the interface contributions…

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## [Tetrahedral and Triangular Meshes Imported from Gmsh in FEniCSx](https://fenicsproject.discourse.group/t/tetrahedral-and-triangular-meshes-imported-from-gmsh-in-fenicsx/13538)

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**Author:** [@Mehran1](https://fenicsproject.discourse.group/u/Mehran1)\
**Replies:** 1\
**Last updated:** [February 6, 2024, 7:22pm UTC](https://fenicsproject.discourse.group/t/tetrahedral-and-triangular-meshes-imported-from-gmsh-in-fenicsx/13538 "2024-02-06T19:22:04Z")

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Hello everyone, I’m currently facing an issue with importing a .msh file, generated with Gmsh, into FEniCSx. The challenge lies in accurately defining the physical domains and surfaces created in Gmsh, which are crucial…

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## [Parallelized Interpolation from mesh to submesh](https://fenicsproject.discourse.group/t/parallelized-interpolation-from-mesh-to-submesh/12731)

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**Author:** [@leshinka](https://fenicsproject.discourse.group/u/leshinka)\
**Replies:** 4\
**Last updated:** [February 3, 2024, 2:48am UTC](https://fenicsproject.discourse.group/t/parallelized-interpolation-from-mesh-to-submesh/12731 "2024-02-03T02:48:56Z")

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I am following the interpolation process from mesh to submesh as listed at dolfinx/python/test/unit/fem/test\_interpolation.py at e4439ccca81b976d11c6f606d9c612afcf010a31 · FEniCS/dolfinx · GitHub. However, the speed of e…