Author(s)

W. Frank

Abstract

In the paper detailed investigations of the flow structures around a cubic body in a turbulent channel flow at high Reynolds numbers are carried out by means of a large-eddy-simulation (LES). Special attention is turned to the resolution of secondary structures of the flow field which up to now could not be resolved by numerical calculations. By simplification of the subgrid energy equation and the development of fast Poisson solvers efficient calculation times are reached. Due to the correct approximation of the velocity gradients at the sharp edges of the body the shape and the size of the numerical determined separated flow regions agree very well with corresponding experiments

Keywords