Abstract
The mechanism of vorticity generation by shock-vorticity interaction is investigated by means of direct numerical simulation of a compressible fluid and an analysis using the Rankine-Hugoniot jump relation. The generation of vorticity caused by a passage of a shock wave is confirmed numerically by comparing the vorticity on the front and the back sides of the shock. In order to explain the generation mechanism, the amount of vorticity generated from a uniform flow on crossing a curved shock is estimated using the Rankine-Hugoniot jump relation. It is shown that vorticity is generated tangentially to the curved shock wave through the baroclinic torques.
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