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Membrane and Darcy's law

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Old   August 29, 2010, 07:41
Default Membrane and Darcy's law
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I'm new to OpenFOAM, and as a starting project, I'm trying to simulate the crossflow over a permeable membrane. The setup is roughly sketched in this figure:

For the flow through the membrane, I simply wish to put an "internal" boundary condition on the membrane, setting:


So, my question is; how do I implement such an internal boundary condition?

Also, what would be a proper boundary condition for the pressure at the membrane?
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