REPOST: Hello, I'm new to CFX and would appreciate it if someone out there can give me a reply, any reply. I am trying to model wind blowing over a reservoir surface. I am trying to avoid the complications of modelling the air moving above it. So instead, I am thinking of applying a shear boundary condition directly at the free surface . Is this possible, if yes, how do i do this? I have tried using a moving wall boundary with a velocity, but I would prefer applying a direct shear.
Thanks for any help in advance!
Re: boundary condition
It is not possible to directly specify shear. What you could do is make the local velocity a function of the local shear stress by using a CEL expression (i.e. get the shear you want by varying velocity).
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