Simulations of a Reshocked Varicose Gas Curtain

The evolution of a varicose curtain of SF$_{6}$ gas accelerated by a Mach 1.2 shock wave in air and then reshocked 600 $\mu $s later has been examined both experimentally and computationally. Two-dimensional simulations incorporating the experimental initial conditions have been performed using RAGE, an adaptive-mesh Eulerian code. The effects on the flow before and after reshock are examined and the results are compared with experimental images of the curtain's evolution. Also a sub-grid mix model in RAGE is applied to the simulations and the computed density and velocity correlations are compared with data available from the experiment.