Robert Mettin: abstract ISNA16_2

Advanced Observation and Modeling of an Acoustic Cavitation Structure

R. Mettin, P. Koch, D. Krefting, and W. Lauterborn

Drittes Physikalisches Institut, Universität Göttingen,
Bürgerstraße 42-44, D-37073 Göttingen, Germany


Abstract

High power input of ultrasound to liquids causes acoustic cavitation. In typical resonator set-ups cavitation bubbles form dynamic structures that result in an inhomogeneous bubble distribution. The pattern formation processes are still not completely understood, and a detailed observation requires fast recording facilities. With respect to a frequently found double layer bubble structure, this paper presents high-speed images and an interpretation thereof in terms of the formation mechanism. It is found that bubbles cluster between pressure node and antinode regions. A simulation by a particle approach based on nonlinear bubble oscillations can reproduce this feature.


in: O.V. Rudenko and O.A. Sapozhnikov (eds.),
Nonlinear Acoustics at the Beginning of the 21st Century,
(Proceedings of the 16th International Symposium on Nonlinear Acoustics ISNA-16),
Faculty of Physics, MSU, Moscow, 2002, vol. 2, pp. 1003-1006.


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