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The effect of coupling on bubble fragmentation acoustics

Czerski, H; Deane, GB; (2011) The effect of coupling on bubble fragmentation acoustics. The Journal of the Acoustical Society of America , 129 (1) , Article 74. 10.1121/1.3514416. Green open access

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Abstract

Understanding the formation and evolution of bubble populations is important in a wide range of situations, including industrial processes, medical applications, and ocean science. Passive acoustical techniques can be used to track changes in the population, since each bubble formation or fragmentation event is likely to produce sound. This sound potentially contains a wealth of information about the fragmentation process and the products, but to fully exploit these data it is necessary to understand the physical processes that determine its characteristics. The focus of this paper is binary fragmentation, when turbulence causes one bubble to split into two. Specifically, the effect that bubble-bubble coupling has on the sound produced is examined. A numerical simulation of the acoustical excitation of fragmenting bubbles is used to generatemodelacoustic signals, which are compared with experimental data. A frequency range with a suppressed acoustic output which is observed in the experimental data can be explained when coupling is taken into account. In addition, although the driving mechanism of neck collapse is always consistent with the data for the larger bubble of the newly formed pair, a different mechanism must be driving the smaller bubble in some situations.

Type: Article
Title: The effect of coupling on bubble fragmentation acoustics
Open access status: An open access version is available from UCL Discovery
DOI: 10.1121/1.3514416
Publisher version: http://dx.doi.org/10.1121/1.3514416
Language: English
Additional information: Copyright 2011 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared in Czerski, H; Deane, GB; (2011) The effect of coupling on bubble fragmentation acoustics. The Journal of the Acoustical Society of America , 129 (1) 74 - 74 and may be found at http://dx.doi.org/10.1121/1.3514416
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/1426199
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