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Forum: Main CFD Forum

December 24, 2010, 07:27

Replies: 3

k-e model

Views: 1,478

Posted By ignat

y+ is dimensionless parameter. What does it mean...

y+ is dimensionless parameter. What does it mean "m"?
May be it is dimension value?

Optimal y+ near the wall is about 1 (dimensionless!) for calculation without wall function and 10-100 for...

Forum: Main CFD Forum

December 19, 2010, 04:36

Replies: 3

k-e model

Views: 1,478

Posted By ignat

First, evaluate drag coeff as...

First, evaluate drag coeff as c_f=0.074Re_L^{-1/5}, where L is the chord length.
Then calculate friction stress \tau_w=1/2 c_f\rho U^2 and friction velocity u_*=\sqrt{\tau_w/ \rho}

Then we have
...

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