Abstract
The present paper reports the visualization study of the initiation of a shock wave generated by a rebounding bubble and a micro-jet induced when the bubble is collapsed. The underwater spherical shock wave is obtained by using a 10 mg silver azide(AgN3) pellet, and visualized by using double exposure holographic interferometry. In order to understand the quantitative properties of this phenomenon, the density and pressure distributions were evaluated by measuring the interference fringes and using Tait equation. Consequently, the sudden pressure change when the shock wave is generated by the rebounding bubble and the structure of the micro-jet were clarified
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