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-   -   Anisotropic, implicit momentum source term (http://www.cfd-online.com/Forums/openfoam-programming-development/119168-anisotropic-implicit-momentum-source-term.html)

chris_j_meyer June 11, 2013 06:58

Anisotropic, implicit momentum source term
 
Hi All

Will not bore you with the details, but I am adding a momentum source term that is anisotropic. To do this explicitly is quite easy as a volVectorField with the sources can just be added to the U-equation. For an implicit formulation the following can be used and added to the U-equation:

fvm::Sp(a, U)

However, "a" can at best be a volScalarField and hence the source will be locally isotropic. Is there any way in which I can add different implicit source terms to the momentum equations in the three coordinate directions?

Chris

Lieven June 11, 2013 10:56

Hi Chris,

Have a look at the implementation of the porous media source term. I think this is what you are looking for.

Cheers,

Lieven

ski July 18, 2013 18:42

I'd like to do this too..

Issue is that it appears to be using Jacobi method to solve, which tends to give poor convergence rates. Anyone have any experience on this?


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