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May 2, 2005, 17:29 |
Wall functions - iterative approach
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#1 |
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Hello,
I am using LES for my flow. I am not resolving near wall structures and hence trying to use the wall function approach, i.e. using u/ut = 1/0.41 * ln(y*ut/nu) + 5.2 Here, u and y are the streamwise velocity and distance of the grid point nearest to the wall. nu is the kinematic viscosity. In the above equation the only unknown is friction velocity ut: ut = sqrt(tau_w/rho) where tau_w is the wall shear stress and rho is density Does anyone have any experience with the methods (iterative) used to obtain ut? Thanks -agg |
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