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-   -   relationship between wall shear stress and TKE (http://www.cfd-online.com/Forums/fluent/46798-relationship-between-wall-shear-stress-tke.html)

winter December 11, 2007 18:11

relationship between wall shear stress and TKE
 
can somebody show me the relationship between wall shear stress and turbulent kinetic energy? I have an equation of u_tau=(shear stress/row)^0.5=C_miu^(1/4)k^(1/2), but I don't know how k and shear stress Tau_w are calculated when standard wall function is employed. I mean, how wall function is used in FLUENT. For example, knowing y_p, u_tau is necessary to calculate y*, then from the experimental stand wall function, we have U_tau, and again from U_tau to u_p, u_tau is necessary. to calculate u_tau, Tau_w or k is necessary, which one is used then? Or am I right with above sequence? thanks a lot.



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