What values/expressions does CFX use at the noslip wall boundary to solve the k and epsilon/omega equations in the case of two equation turbulence models?
In CFX a flux boundary condition is specified for the kequation: F_k = 0. So you see the conservative value in CFXPost. We specify finite values for epsilon and omega. For epsilon this is the loglaw value, whereas for omega we have the automatic wall treatment (blending between viscous sublayer and loglaw relation). eps = Cmu^(3/4)*k^(3/2)/(kappa*y) where kappa is the Von Karman constant for smooth walls. Please note that epsilon at the first interior node is set equal to this value. The boundary value for epsilon is not used anywhere. Please see also the Documentation (Solver Theory Guide => Turbulence and Wall Function Theory => Modeling Flow Near the Wall => Automatic NearWall Treatment for OmegaBased Models) for a detailed description. 

