Abstract
An experimental and numerical study was made of the interaction of underwater shock waves with air bubbles which may appear in human tissue damage occurring in the extracorporeal shock wave lithotripsy. In order to visualize the shock-bubble interaction, double exposure holographic interferometry was applied to a 1.7 mm diameter air bubble exposed to underwater shock waves which were initiated by a 10 mg silver azide (AgN3) pellet. By counting the interference fringes, the formation of the high pressure spot and the resulting rebound shock and also microjets were quantitatively clarified. The numerical result agreed qualitatively with the experimental result.
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