definition of u* for y+<10 -- CFD Online Discussion Forums

May 29, 2003, 12:40	*definition of u for y+<10**	#1
Robert Spall Guest Posts: n/a	Does anyone know how Fluent specifies the value of u* in equation 10.5-32 (Fluent 6 user manual) which defines the wall value of the omega boundary condition (k-omega turbulence model)? The only definition I can find in the manual is u= C_mu0.25 k0.5, which is valid in the log layer, but not the viscous sublayer. If that is used then u->0 as the grid is refined. Perhaps it is defined as sqrt(tau_wall/rho)?

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