EVALUATION OF LAMINAR-TURBULENT TRANSITION AND EQUILIBRIUM NEAR WALL TURBULENCE MODELS

Abstract

Accurate prediction of laminar-turbulent transition as well as fully turbulent flows is of much practical importance. In this study, both topics are investigated. The eⁿ method is used to predict transition locations for flows with various angles of attack around an NACA 0012 airfoil. After the transition point the k-epsilon turbulence model is adopted. Computations for flow over a flat plate are done to understand the impact of grid distribution and the wall function treatment on the performance of the k-epsilon turbulence model. In attached and mildly separated flows, satisfactory predictions can be made with the pragmatic eⁿ transition model and the k-epsilon turbulence model.