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Mass transfer enhancement produced by laser induced cavitation

By Peter R. Birkin, Hanne-Maria Hirsimäki, Jeremy G. Frey and Timothy G. Leighton

Abstract

A microelectrode is used to measure the mass transfer perturbation and characteristics during the growth and subsequent collapse of a single bubble (which, following its initial expansion, achieved a maximum radius, Rm, of not, vert, similar500–1000 ?m). This mass transfer enhancement was associated with the forced convection, driven by bubble motion, as the result of a single cavitation event generated by a laser pulse beneath a 25 ?m diameter Au microelectrode. Evidence for bubble growth and rebound is gained from the electrochemical and acoustic measurements. This is supported with high-speed video footage of the events generated. A threshold for the formation of large cavitation bubbles in electrolyte solutions is suggested

Topics: QD
Year: 2006
OAI identifier: oai:eprints.soton.ac.uk:149387
Provided by: e-Prints Soton

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Citations

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