Modeling internal flow with normal velocities on walls- permeable walls
 

Hi everyone.

I'm trying to simulate blood flow in a vessel, where the boundary condition on wall for u is no slip, but for v is a constant definite value. In other words, wall is permeable in y direction. How can I apply this kind of boundary to my problem in CFX?

Tnx for your help

I presume you mean u is in the tangential direction and v is in the normal direction.

The easiest way of doing this would seem to be a normal no-slip wall with a mass source/sink applied to the wall which gobbles up fluid at your prescribed rate.

Tnx for your reply
your assumption is correct.
But now the question is what is the relation between source/sink intensity and the normal velocity?
Question is posed regarding that the problem specifies the normal velocity on the wall, and nothing more.

Make the magnitude of the mass sink a function of the wall shear stress. I would not make it a function of normal velocity as it will then be mesh dependent.

Real Smart.
I will try it for sure

Real smart, I will try it for sure
Thanks a lot, friend.