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Richtmyer-Meshkov experiments for a membrane-less, sinusoidal gas interface are carried out in a vertical shock tube for a pre-shock Atwood number (A = (σ2 – σ1)/(σ1 + σ2)) of approximately 0.68 at M = 1.26 and M = 2.05. The perturbation amplitude is obtained by analyzing a time sequence of pre-shock and post-shock images. The Mikaelian and Dimonte & Schneider models both predict the observed growth in the perturbation amplitude, with better agreement obtained for the data at M = 1.26.
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Motl et al. (2007) studied this question.
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