Sound emission on bubble coalescence: imaging, acoustic and numerical experim

Manasseh, R., Riboux, G., Bui, A. and Risso, F. (2007). Sound emission on bubble coalescence: imaging, acoustic and numerical experim. In: Peter Jacobs, Tim McIntyre, Matthew Cleary, David Buttsworth, David Mee, Rose Clements, Richard Morgan and Charles Lemckert, 16th Australasian Fluid Mechanics Conference (AFMC). 16th Australasian Fluid Mechanics Conference (AFMC), Gold Coast, Queensland, Australia, (167-173). 3-7 December, 2007.

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Author Manasseh, R.
Riboux, G.
Bui, A.
Risso, F.
Title of paper Sound emission on bubble coalescence: imaging, acoustic and numerical experim
Conference name 16th Australasian Fluid Mechanics Conference (AFMC)
Conference location Gold Coast, Queensland, Australia
Conference dates 3-7 December, 2007
Proceedings title 16th Australasian Fluid Mechanics Conference (AFMC)
Place of Publication Brisbane, Australia
Publisher School of Engineering, The University of Queensland
Publication Year 2007
Year available 2007
Sub-type Fully published paper
ISBN 978-1-864998-94-8
Editor Peter Jacobs
Tim McIntyre
Matthew Cleary
David Buttsworth
David Mee
Rose Clements
Richard Morgan
Charles Lemckert
Start page 167
End page 173
Total pages 7
Collection year 2007
Language eng
Abstract/Summary Laboratory and numerical experiments are presented on the emission of sound on bubble coalescence. The aim was to better understand the fluid-dynamical mechanisms leading to sound emission. Bubbles were formed from a needle. Coordinated high-speed video and acoustic measurements demonstrated that the emission of high-amplitude sound coincided with the coalescence of a primary bubble with a smaller secondary. A numerical simulation was performed using a compressible level-set front-capturing code, in which a compressible gas and nearly compressible liquid are modelled by a single set of the Navier-Stokes equations with a generic equation of state for both phases. In the simulations, the spherical primary and secondary bubbles initially at acoustic equilibrium were brought into contact. The numerical calculations predicted the frequency of emitted sound and the bubble coalescence dynamics very well. The results suggest that the equalization of Laplace pressures could be the mechanism leading to sound emission.
Subjects 290500 Mechanical and Industrial Engineering
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown

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Created: Tue, 18 Dec 2007, 14:55:39 EST by Laura McTaggart on behalf of School of Engineering