A candidate mechanism for exciting sound during bubble coalescence

Czerski, Helen (2011) A candidate mechanism for exciting sound during bubble coalescence. Journal of the Acoustical Society of America, JASA Express Letters, 129, (3), EL83-EL88. (doi:10.1121/1.3553175).


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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 coalescence dynamics, 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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1121/1.3553175
ISSNs: 0001-4966 (print)
Related URLs:
Subjects: Q Science > QC Physics
Divisions : University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Fluid Dynamics and Acoustics
ePrint ID: 182379
Accepted Date and Publication Date:
4 March 2011Published
Date Deposited: 28 Apr 2011 08:53
Last Modified: 31 Mar 2016 13:36
URI: http://eprints.soton.ac.uk/id/eprint/182379

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