THE INFLUENCE OF VELOCITY SCALING ON THE EVOLUTION OF DISCRETE VELOCITY GASES

Abstract

A scaling procedure for regular and hierarchical discrete velocity models is proposed. The method is based on the fact that a sufficiently small perturbation propagates with the speed of sound. Discrete model Boltzmann equations scaled by this procedure are applied to an elastically and inelastically interacting gas mixture in the presence of a radiation field. The excitation of laser-induced density oscillations is simulated numerically by using discrete velocity models of Shizuta and Union Jack type. The most significant differences between the models are discussed.