Skin friction coefficient
Hi,
I'm looking for the skin friction coefficient formula that CFX uses. But I didn't find it on user manual. Could you please tell me which skin friction coefficient formula does CFX use? Thank you very much! |
tau_wall/(1/2*rho*Uinf^2)?
Not sure what you mean. Do you mean how do they get tau_wall? |
Quote:
http://www.cfd-online.com/Wiki/Wall_shear_stress But does it just set the fluid velocity at the wall as 0 then compute the (du/dy)_{y=0}? But how does it know du/dy at the wall(y=0) without knowing the wall shear stress in advance? |
That can be a complicated discussion. I suggest looking at chapter 2 of the CFX Theory Guide.
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