Flow Around a Simplified Car, Part 1: Large Eddy Simulation
Journal article, 2005

Large eddy simulations (LES) were made of flows around a generic ground vehicle with sharp edges at the rear end (an Ahmed body with a 25° angle of the rear slanted surface). Separation of the flow at the rear results in large regions with recirculating flow. As the separation is determined by the geometry, the Reynolds number effects are minimized. Resolution requirements of this recirculating flow are smaller than those in LES of wall attached flows. These two consequences of the geometry of the body are used to predict the experimental flow at relatively high Reynolds number. Recommendations are pre-sented for the preparation and realization of LES for vehicle flows. Comparison of the LES results with the experimental data shows good agreement. Copyright © 2005 by ASME.

Generic Car Body


Ground Vehicle

Vehicle Aerodynamics

Large Eddy Simulation


Sinisa Krajnovic

Chalmers, Applied Mechanics, Fluid Dynamics

Lars Davidson

Chalmers, Applied Mechanics, Fluid Dynamics

Journal of Fluids Engineering, Transactions of the ASME

0098-2202 (ISSN) 1528-901X (eISSN)

Vol. 127 5 907-918

Subject Categories

Fluid Mechanics and Acoustics



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