CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   CFX (http://www.cfd-online.com/Forums/cfx/)
-   -   How to use a variable sand roughness height in wall boundary?? (http://www.cfd-online.com/Forums/cfx/92887-how-use-variable-sand-roughness-height-wall-boundary.html)

Kelly September 28, 2011 11:01

How to use a variable sand roughness height in wall boundary?? Help me Please.... :(
 
Hi there,

I made some simulations in CFX with the Boundary Condition Wall Non-Slip with a constant value of sand grain roughness. Now, i need to make this value vary with the friction velocity, so I have to introduce the equation in the boundary condition, in order, to get this value in each iteration and actualize the k0 value.

Can anyone tell me how can I do this??

Thanks

P.S: I apologize for my English, but I'm Portuguese! :)


All times are GMT -4. The time now is 12:19.