Large Eddy Simulation of the Flow Around an Ahmed Body

Abstract

A new approach for large eddy simulation (LES) of the flows around ground vehicles is demonstrated. It is based on the character of the flow with large regions of recirculations rather than on traditional resolution requirements for the LES of wall bounded flows. Recommendations for preparing and realization of LES for vehicle flows are presented and validated on a test case of the flow around an Ahmed body with the 25° angle of the rear slanted surface. Comparison of the LES results with the experimental data proved the validity of this new method.