[chen112p]

Hello, I am trying to model a three dimensional porous fence using darcy-forchheimer in a RANS run. I have successfully created a cellZone and dropped the velocity going thru to the level I want. How would you treat the TKE? Supposedly there should be almost no TKE convection across the porous fence which will lead to a TKE drop. Since darcy-forchheimer doesn't modify the TKE equation, RANS shows a TKE rise due to the velocity gradient.

So I would like to know whether there is some kind of internal boundary condition that allows U to pass through (like cyclic), and also like a wall for TKE, epsilon and nut.

Thanks!

Junting Chen

[olesen]

You are correct that the porosity treatment is somewhat lacking. Often (depending on the porosity values) the TKE should drop and dissipation (on entrance at least) should increase.