[Mars35]

Hi All,

I am trying to simulate cross-sectional ultrafiltration. I have a wall with finite thickness to represent the membrane. When I tried to make it a porous zone, I am not sure how I should set my direction vector using a conical coordinate system. Can anyone explain how it works exactly? Thank you.

[Mars35]

I am not sure if this is 100% correct.

If my inlet fluid flow direction is in the z-direction (rotation axis).

The cone angle is 0 since it is a cylinder. The cone axis vector should be (0,0,1); the point on the cone Axis can be (0,0,0).

Let me know if there is any mistake in my thought, thank you!