Confined Shocks inside Isolated Liquid Volumes -- A New Path of Erosion?

Details Confined Shocks inside Isolated Liquid Volumes -- A New Path of Erosion? Confined Shocks inside Isolated Liquid Volumes -- A New Path of Erosion?

2011-09-14

arxiv.org/abs/1109.3175v2

Physics of Fluids 23, 101702 (2011)

Physics

Fluid Dynamics

4 page letter, 4 figures

Scientific paper

10.1063/1.3647583

The unique confinement of shock waves inside isolated liquid volumes amplifies the density of shock-liquid interactions. We investigate this universal principle through an interdisciplinary study of shock-induced cavitation inside liquid volumes, isolated in 2 and 3 dimensions. By combining high-speed visualizations of ideal water drops realized in microgravity with smoothed particle simulations we evidence strong shock-induced cavitation at the focus of the confined shocks. We extend this analysis to ground-observations of jets and drops using an analytic model, and argue that cavitation caused by trapped shocks offers a distinct mechanism of erosion in high-speed impacts (>100 m/s).

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