The Low y+ wall treatment implements the model and boundary conditions in low-Reynolds number form as suggested by Spalart and Allmaras. Damping functions are used for the source terms in the transport equation, which is solved without modification all the way to the wall cell. Wall laws are not used to evaluate shear stress. This should only be used if the mesh is fine enough to resolve the viscous sublayer. If y+ values substantially exceed 1, significant errors will result. If there is any doubt, All y+ wall treatment should be used.