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A candidate mechanism for exciting sound during bubble coalescence

Czerski, H; (2011) A candidate mechanism for exciting sound during bubble coalescence. The Journal of the Acoustical Society of America , 129 (3) , Article EL83. 10.1121/1.3553175. Green open access

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Abstract

Coalescing bubbles are known to produce a pulse of sound at the moment of coalescence, but the mechanism driving the sound production is uncertain. A candidate mechanism for the acoustic forcing is the rapid increase in the bubble volume, as the neck of air joining the two parent bubbles expands. A simple model is presented here for the volume forcing caused by the coalescencedynamics, and its predictions are tested against the available data. The model predicts the right order of magnitude for the acoustic amplitude, and the predicted amplitudes also scale correctly with the radius of the smaller parent bubble.

Type: Article
Title: A candidate mechanism for exciting sound during bubble coalescence
Open access status: An open access version is available from UCL Discovery
DOI: 10.1121/1.3553175
Publisher version: http://dx.doi.org/10.1121/1.3553175
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; (2011) A candidate mechanism for exciting sound during bubble coalescence. The Journal of the Acoustical Society of America , 129 (3) , Article EL83 and may be found at http://dx.doi.org/10.1121/1.3553175.
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/1426197
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