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

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.

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

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

[Prakash.Paudel]

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