APPLICATION OF PARTIALLY-AVERAGED NAVIER-STOKES SIMULATIONS FOR BLUFF BODY AERODYNAMICS

This paper presents a study about the prediction of flows around simplified vehicles using Partially-Averaged Navier-Stokes (PANS). Numerical simulations are performed for two simplified vehicles: a slanted-back Ahmed body at Re=30 000 and a squared-back Ahmed body at Re=300 000. A comparison of the resolved and modeled physical flow scales is made with corresponding LES and experimental data for a better understanding of the performance of the PANS model. The PANS model is compared for coarse and fine grid resolutions and it is indicated that even a coarse-grid PANS simulation is able to produce fairly close flow predictions to those from a well-resolved LES simulation.