Wall function's solving procedure. -- CFD Online Discussion Forums

March 22, 2013, 08:33		#6
Aeronautics El. K. Senior Member Lefteris Join Date: Oct 2011 Location: UK Posts: 337 Rep Power: 15	Hello Forrest, You don't have to make an assumption for Uτ since you can compute it from the formula Uτ=sqrt(τw/ρ), where ρ is the density and τw the shear stress which can be computed from the formula τw=Cf*(0.5ρU^2). In order to estimate Cf, choose a formula from here: http://www.cfd-online.com/Wiki/Skin_...on_coefficient __________________ Lefteris

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