Evaluation of laminar-turbulent transition and equilibrium near wall turbulence models

Accurate prediction of laminar-turbulent transition as well as fully turbul ent flows is of much practical importance. In this study, both topics are i nvestigated. The e(n) method is used to predict transition locations for fl ows with various angles of attack around an NACA 0012 airfoil. After the tr ansition point the k-epsilon turbulence model is adopted Computations for f low? over a flat plate are done to understand the impact of grid distributi on and the wall function treatment on the performance of the k-epsilon turb ulence model. In attached and mildly separated flows satisfactory predictio ns can be made with the pragmatic e(n) transition model and the k-epsilon t urbulence model.