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Surface Instability and Thermal and Cavitational Phenomena as Mechanisms of Drop Explosions in Acoustic Fountains

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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

A theoretical analysis is performed of the surface instability and acoustic and temperature fields in an acoustically excited drop of liquid. Such drops form in an acoustic fountain created under the action of an ultrasonic beam focused on the free boundary of the liquid. A model of a solitary spherical drop is used to describe the considered phenomena. This model is a resonator with an acoustically soft boundary, inside which a spherically symmetrical nonlinear acoustic field evolves. Mechanisms of drop explosions are proposed.

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ACKNOWLEDGMENTS

This work was supported by the Russian Foundation for Basic Research, project nos. 18-32-00683 mol_а, 17-02-00261, and 17-54-33034.

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Authors and Affiliations

  1. Moscow State University, 119991, Moscow, Russia

    E. A. Annenkova & O. A. Sapozhnikov

  2. Center for Industrial and Medical Ultrasound, Laboratory of Applied Physics, University of Washington, WA 98105-6698, Seattle, USA

    O. A. Sapozhnikov

Authors
  1. E. A. Annenkova
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  2. O. A. Sapozhnikov
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Corresponding author

Correspondence to E. A. Annenkova.

Additional information

Translated by I. Obrezanova

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Annenkova, E.A., Sapozhnikov, O.A. Surface Instability and Thermal and Cavitational Phenomena as Mechanisms of Drop Explosions in Acoustic Fountains. Bull. Russ. Acad. Sci. Phys. 83, 73–76 (2019). https://doi.org/10.3103/S1062873819010039

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  • DOI: https://doi.org/10.3103/S1062873819010039

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