# moving and slip wall boundary

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 March 29, 2005, 15:01 moving and slip wall boundary #1 hongchun Guest   Posts: n/a 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

 March 29, 2005, 19:18 Re: moving and slip wall boundary #2 debs Guest   Posts: n/a 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.

 March 29, 2005, 20:54 Re: moving and slip wall boundary #3 hongchun Guest   Posts: n/a 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

 March 29, 2005, 21:34 Re: moving and slip wall boundary #4 debs Guest   Posts: n/a Check the manual and also when setting boundary conditions in the solver you can remove the no slip setting and include the udf

 July 9, 2010, 11:29 #5 New Member   Prakash Paudel Join Date: May 2010 Location: Toronto Posts: 25 Rep Power: 8 Hey debs, can u please tell me how exactly would u impose partial slip BC??? i appreciate ur help

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