COMPARISON OF NUMERICAL AND EXPERIMENTAL RESULTS FOR A TURBULENT-FLOWFIELD WITH A LONGITUDINAL VORTEX PAIR

A numerical simulation of a three-dimensional turbulent flow with long itudinal vortices embedded in the boundary layer on a channel wall is presented. The flow is described by the unsteady incompressible Reynol ds averaged Navier-Stokes equations and the standard k-epsilon turbule nce model. A finite difference scheme based on the SOLA-algorithm is d eveloped for the numerical solution of the governing equations. Compar ison with the experimental data of Pauley and Eaton (1988 a, b) shows that the numerical computations predict the general characteristics of the flow correctly. Agreement to within 13 percent is obtained for th e worst location in mean velocity fields. The average deviation of pre dicted mean streamwise velocity from the experimental data is 3.6 perc ent.