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mantec July 25, 2012 05:43

wall function
 
how to proceed with implementing wall function approach

Let’s say
I have calculated the Y+ and U+ values at the first node from the wall.
Assume Y+ < 5 therefore Y+ = U+

What is the next step.
Calculate the ‘u’ value from U+ which is u/ut where ut is the friction velocity and substitute the ‘u’ values for calculating the diffusive fluxes of the momentum equation or replace the old value ‘u’ with this new ‘u’ value calculated from U+. .

duri July 27, 2012 09:13

u need to be updated only from momentum equation. This equation is used to evaluate shear stress at the wall.


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