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Sixth International Symposium on Turbulence and Shear Flow Phenomena
June, 22-24, 2009 , Seoul National University, Seoul, Korea

DOI: 10.1615/TSFP6

LARGE EDDY SIMULATION OF FLOW OVER A THREE-DIMENSIONAL MODEL VEHICLE

pages 735-739
DOI: 10.1615/TSFP6.1180
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ABSTRACT

In the present study, large eddy simulations of turbulent flow over a three-dimensional model vehicle are conducted at Re=170,000 based on the vehicle height and free-stream velocity using an immersed boundary method (Kim et al., 2001). As subgrid-scale models, we use the Smagorinsky model (SM; Smagorinsky, 1963) and a dynamic Vreman model (DVM; Park et al. 2006), respectively. The results of simulations are compared with those of an experiment by Khalighi et al. (2001). It is shown that results from DVM show good agreements with the experimental ones while SM results in poor predictions. Instantaneous flow fields are observed and it is found that an arch-like vortical structure exists in the near-wake of the vehicle. Also, we examine the flow statistics around the vehicle.

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