[ftab]

Dear CFX experts,
I am trying to model a blood flow inside the artery and also its wall.
The model looks like this:


As seen in the image, the boundary between the fluid domain and the tissue in reality only lets the normal component of the velocity to enter.
From my simulation with fluid domain for the lumen (inside artery) and porous tissue (inside the wall) I get only tangent velocity inside the wall, which exists only very close to the boundary (probably due to very low permeability).



My question is whether there is a better way to model it and get the correct results in the interface?
- If I want to assume it as a perforated plate, how do I set the boundary?
-If I go with directional loss for the porous, how I set the streamwise direction components equal to normals on each cells?

I appreciate your valuable hints!