NEAR-WALL TURBULENCE MODELS FOR 3D BOUNDARY-LAYERS

Calculations of the three-dimensional boundary layer in an S shaped duct are performed with various k - epsilon models. Three different near-wall models are used for the kappa - epsilon model, of which one is using a new set of near-wall damping functions deduced from direct numerical simulations of turbulent channel flow available in the literature. The results show that it is possible to obtain damping functions giving better agreement, especially for k and epsilon, with direct simulation data and experiments than with damping functions deduced from trial and error.