Comparison of low Reynolds Number k-ε Models in Predicting Complicated Flow Field Around a Bluff Body

Abstract:

Four low Reynolds number kε turbulence models were adopted to numerically simulate the flow field around 1∶3 scaled standard Moto Industry Research Association(MIRA) sedan model with reasonable grid strategy. Based on wind tunnel test data, the feature of different low Reynolds number k-ε turbulence models for simulating different flow fields with unique movement characteristics around special parts of vehicle body was studied systematically by comparing CD, surface pressure coefficient and oil flow patterns on the surface. Finally, the levels of ability to predict the high Reynolds number flow around a bluff body near ground of four low Reynolds number k-ε turbulence models was identified.