Large-eddy simulation and multiscale modelling of a Richtmyer-Meshkov instability with reshock

This paper examines, by computational simulation, a canonical Richtmyer-- Meshkov instability realized within the confines of a shock-tube as a planar shock interacts with a co-planar density interface formed by the contact between two gases, air and sulfur hexafluoride (SH 6 ) (Vetter & Sturtevant 1995). Slight perturbations or irregularities in the density interface, for example local deviations from co-planarity, form the density misalignments required to initiate RMI during shock interaction. A second and much more energetic RMI occurs after the initial shock has traversed the extent of the shock-tube, reflected o# the tube end and reshocks the now greatly distorted interfac