moving and slip wall boundary
 

Dear all:

I got a problem and need your help. I want to model a water drop oscillation on a solid wall, which vibrates asymmetrically. The drop might move on the surface. Therefore, the boundary condition for the wall is moving wall and aslo a slip wall. I read the manual of FLUENT, it says that I can not define a slip moving wall. Is that true? What should I do?

Thanks a lot

chun

Re: moving and slip wall boundary
 

You can add a partial slip boundary condition through an udf . I'm not sure of how to write a udf. But i can help you to incorporate a partial slip BC.

Re: moving and slip wall boundary
 

Dear Debs:

Actually in my case, the wall moves with a sinwave U, so for the slip boundary condition u = U + A*du/dy(y=0), A, the slip coefficient. You mean I can write a UDF for this equation?

I don't know how to write UDF and need to read the manual.

Thanks a lot

Re: moving and slip wall boundary
 

Check the manual and also when setting boundary conditions in the solver you can remove the no slip setting and include the udf

Hey debs, can u please tell me how exactly would u impose partial slip BC??? i appreciate ur help