SEPARATED FLOW COMPUTATIONS WITH THE K-EPSILON-UPSILON(2) MODEL

Turbulent separated flows over a backstep, in a plane diffuser and aro und a triangular cylinder, are computed with the kappa-epsilon-nu(2) m odel. These provide examples of massive separation, of smooth separati on, and of unsteady vortex shedding. It is shown that to accurately pr edict tile time-averaged properties of bluff body flow, it is necessar y to resolve the coherent vortex shedding. The near-wall treatment of the <(nu(2))over bar>-f(22) system of equations is able to cope with b oth the massive and smooth separations. Good agreement between experim ent and prediction is found in all cases.