This paper describes recent works of practical applications of vortex element methods to study of automotive flows, carried by the authors’ group, explaining the mathematical basis of the method based on the Biot-Savart law. It is pointed as one of the most attractive features of the vortex method that the numerical simulation using the method is considered to be a new and simple technique of large eddy simulation, because they consist of simple algorithm based on physics of flow and it provides a completely grid-free Lagrangian calculation. As typical results of automotive flows, unsteady flows around a simplified vehicle model such as a wedge model, unsteady flows around a heavy vehicle model as a tractor-trailer, and unsteady aerodynamic characteristics of a tractor-trailer with meandering motion are explained.

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