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Virtual Car and Motorcycle Aerodynamics
Published May 23, 2007 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
This paper describes the status of CFD usage in the aerodynamic development of passenger cars and motorcycles at the BMW Group. After an explanation of the significance and time frame of aerodynamics in the overall development process the questions are discussed which can be addressed via simulation today. Considering the simulation process it gets clear that the bottleneck is the effort needed to prepare the geometry. For this reason the primary tool at BMW is a Lattice-Boltzmann code which allows the easy handling of complex configurations. The achievable accuracy to date is sufficient for a productive use and is shown on selected examples. Finally some practical applications demonstrate the benefit of simulation for the aerodynamicist.