On transient modeling of the flow around vehicles using the reynolds equation

摘要

Transient simulations of the flow around the ASMO model from Daimler Benz have been done. The model is a well known geometry that is available for the public on internet. The results from the transient simulations are compared with experiments obtained from the Volvo model scale windtunnel and from Daimler Benz. Furthermore comparisons are made with stationary simulations. Transient simulations are of course very expensive and it is a fact that a transient simulation takes at least one order of magnitude longer to converge than a stationary simulation would do on the same mesh. However, a stationary simulation will not always give a stabile solution due to high resolution meshes and well behaved turbulence models that will remind us about the unstationary flow that exists in this type of engineering problems.