How Do I Choose a K-Omega Model and Wall Treatment?

The Standard K-Omega model in its original form is very sensitive to the levels of turbulence in the free-stream. Wilcox has attempted to correct this and other limitations of the model by including several corrections in a recent revision. These corrections are incorporated into STAR-CCM+. However, they need to be used with caution until they are properly validated for complex flow situations.

Menter's BSL K-Omega model and SST K-Omega model combine the insensitivity to free-stream conditions of the K-Epsilon model in the far-field, with retains the advantages of the K-Omega model near walls.

All three K-Omega turbulence models are available with all three wall treatments: high-, low- and all-. For most applications, the recommended choice of models is the SST K-Omega model combined with the all- wall treatment.