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-   -   Modelling porous media adjacent to viscous flow (http://www.cfd-online.com/Forums/main/4571-modelling-porous-media-adjacent-viscous-flow.html)

Rina Lum March 25, 2002 17:51

Modelling porous media adjacent to viscous flow
 
Hi, I am using colocated grid with the Rhie-Chow interpolation. It seems like when i am only modelling a total porous or total non porous flow, my code converges fine. However, once i model both a porous and non porous channel adjacent to each other, then i have problems with convergence, especially at very low level of permeability (<e-12). I am using an incompressible flow so i only use the Darcy law in the momentum eqn. Also, i only apply continuity of velocity and pressure at the porous/non porous interface. Anyone has any idea what is the problem? Thanks!

Rina Lum March 25, 2002 17:55

Re: Modelling porous media adjacent to viscous flo
 
I would like to add that i am running an incompressible flow hence i only use Darcy's law in the momentum eqn. Also, i only apply continuity of velocity and pressure at the porous/non porous interface. Anybody has any idea what the problem is? Thanks!


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