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Old   June 30, 2013, 12:36
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morteza
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HI.
i want to set slip velocity condition on walls and the formula is the maxwell-smoluchowski first order slip condition in this form:
us-uw=((2-alfa)/alfa)*landa*du/dy
so i need to have u gradient with respect of y on walls.
is it possible to do this with writing "CELL" expression?
thanks.
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