cqvip:We apply a hydrodynamic approach to analyze ejecta emanating from doubly shocked liquid metals. In particular, we are interested incharacterizing ejecta velocities in such situations by treating the problem as a limiting case of the Richtmyer–Meshkov instability. We findexisting models for ejecta velocities do not adequately capture all the relevant physics, including compressibility, nonlinearities, and nonstandardshapes. We propose an empirical model that is capable of describing ejecta behavior across the entire parameter range of interest. We thensuggest a protocol to apply this model when the donor material is shocked twice in rapid succession. Finally, the model and the suggestedapproach are validated using detailed continuum hydrodynamic simulations. The results provide a baseline understanding of the hydrodynamicaspects of ejecta, which can then be used to interpret experimental data from target experiments.
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