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Porous media flow pattern

Posted 28 avr. 2021, 08:57 UTC−4 Computational Fluid Dynamics (CFD) Version 5.5 1 Reply

Till Henrich
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Hello,

I'm often facing a strange behaviouz in the flow pattern in porous media. The velocity close to the wall begins to oscillate. The closer to the wall the stronger the oscillations. At the wall itself the velocity is 0 as expected. So, my question is: What causes these oscillations and what to do to avoid them?

Thanks in advance!

Till

1 Reply Last Post 29 avr. 2021, 05:18 UTC−4
Hinrich Arnoldt COMSOL Employee

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Posted: 4 years ago 29 avr. 2021, 05:18 UTC−4

Dear Till,

this sounds like some numerical issue from either meshing or time stepping (if you have a time dependent solver). Please go to www.comsol.de/support and load up the model in a support case.

Kind regards Hinrich

Dear Till, this sounds like some numerical issue from either meshing or time stepping (if you have a time dependent solver). Please go to www.comsol.de/support and load up the model in a support case. Kind regards Hinrich

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