Turbulent channel and Couette flows using an anisotropic k-epsilon model

Abstract

Turbulent channel and Couette flows are studied numerically by using an anisotropic A>e model. A feature of this model lies in an anisotropic expression for the Reynolds stress and the deviation of the Reynolds stress from an isotropic eddy-viscosity representation is incorporated. Only one kind of wall damping function is introduced to impose the no-slip boundary condition on solid walls. The results obtained show that turbulence quantities of channel and Couette flows are in good agreement with experimental data and numerical results from large-eddy simulation. The anisotropy of turbulent intensities, which the usual A:-e model cannot predict, is well reproduced.