Periodic BC in FV #29537
Replies: 2 comments 41 replies
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Hello We have only implemented periodic BCs for nodal variables.
This would connect the value on one face to another |
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It seemed like the issue I had with the periodic boundary was some sort of pressure null space, where no flow would be initiated. Now I made the parallel-sided slab very long with regards to thickness (10:1 ratio) and applied the overburden pressure (rhogH*sin(slope)) on both sides, which somehow kicked in flow so it could fully the true gravitational flow with no longitudinal pressure gradient. The slab seems flat here, but slope is applied by projecting gravity. It gives a ~0.1-0.2% mismatch with the analytical solution on the vertical profile. That's on a very fine mesh though (1.6m resolution in depth for a depth of 100m), and gives quickly higher residuals for lower resolutions. I guess that's because the volume integration requires very high resolution close to the boundaries especially with strong gradients like the base here. Does that make sense to you @GiudGiud ? |
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Hi everyone,
I'm working on an INSFV app and would need to apply periodic boundary conditions to test it on analytical solutions. I can't seem to find any example of the Periodic Action used in FV, and when I'm trying to add it in
[BCs]it's simply being disregarded, (which was somehow expected).The geometry is a simple 2D block so periodicity should be easy to catch.
Here is my input file: https://github.com/AdrienWehrle/diuca/blob/PR_ViscousFlowFVTests/inputs/viscous_diuca/iceslab_fv_2d_SI_nv.i
I'm on moose-libmesh 2024.12.02 and moose-tools 2024.11.13, and the latest version of moose on master.
Thanks a lot in advance for your help!
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