Abstract

The paper presents an order-of-magnitude analysis of the physical processes occurring during the pulsations of a vapor bubble subject to a sound field and shows several numerical examples relating to vapor bubbles in water with and without a translational velocity relative to the liquid. Finally, the growth and collapse of a bubble in a small tube under the action of a heat pulse is considered and it is pointed out that, in suitable conditions, a potentially useful pumping effect without mechanical moving parts can be achieved.KeywordsVapor bubble oscillationstranslating vapor bubblesbubble-powered micro-pump

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