What Is the High y+ Wall Treatment?

The High y+ wall treatment is essentially a wall-function approach where it is expected that the near-wall cell centroid will fall within the boundary layer's logarithmic region. The model does not use damping functions, so that and in Eqns. (169) and (171) and the model's source terms in the wall cell are suitably modified using the standard wall laws. This is only available with the High-Reynolds number Spalart-Allmaras model.