We observed the microbubble motion interacted with shock wave using an ultra-high-speed framing camera. The numerical analytic results using a one dimensional spherical symmetric model showed good agreements with the experimental results. If the initial size of bubble is smaller, the relative propagation speed of the underwater shock wave becomes faster and a microbubble is probably exposed to high pressure behind shock wave discontinuously. Therefore, we consider that the theoretical solutions of the bubble motion equation are probably close to the real microbubble motion. The theoretical estimation will help in determining the optimum conditions for the sterilization of marine bacteria.
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