Two shock accelerated flows, the shock accelerated cylinder and the shock accelerated perturbed planar interface (the Richtmyer-Meshkov instability) are shown to be effectively modeled using vortex models. In this approach the flow evolution is divided into two regimes. In the initial stage the vorticity distribution imposed by the shock wave is assumed to be static and is only allowed to move in a very restricted way. Then, in the final stage, the vorticity distribution is assumed to have evolved into compact vortices with total circulation equivalent to that deposited by the original shock interaction. This approach, while having limitations, nevertheless provides good agreement with experiments. In addition, this approach has the added benefit that it has a stronger connection to the flow physics than do other models used in these problems that are typically more empirical in nature.
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