S0507-2-1 直線状に配置された複数気泡と衝撃波との干渉に関する数値シミュレーション([S0507-2]気泡力学と界面現象(2))

概要

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The present study is concerned with the interaction of an incident shock wave with in-line two bubbles by using the multi-grid ghost fluid method. The influence of the bubble-bubble distance on the formation of the liquid jets and the shock waves from the collapsing bubbles is investigated. It is shown that the collapse of the upstream bubble is decelerated by the rarefaction wave caused by the reflection of the incident shock wave at the surface of the downstream bubble. The shock waves generated by the collapse of the upstream bubble accelerate the collapse of the downstream bubble, which leads to the generation of higher internal gas pressure and faster liquid-jet velocity from the downstream bubble. It is also shown that there exists an initial bubble-bubble distance where the collapse of the downstream bubble is most accelerated.
2010-09-04