Directed jetting from collapsing cavities exposed to focused ultrasound. / Gerold, B.; Glynne-Jones, P.; McDougall, C.; McGloin, D.; Cochran, S.; Melzer, A.; Prentice, P.
In: Applied Physics Letters, Vol. 100, No. 2, 09.01.2012, p. -, 024104.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Directed jetting from collapsing cavities exposed to focused ultrasound
A1 - Gerold,B.
A1 - Glynne-Jones,P.
A1 - McDougall,C.
A1 - McGloin,D.
A1 - Cochran,S.
A1 - Melzer,A.
A1 - Prentice,P.
AU - Gerold,B.
AU - Glynne-Jones,P.
AU - McDougall,C.
AU - McGloin,D.
AU - Cochran,S.
AU - Melzer,A.
AU - Prentice,P.
PY - 2012/1/9
Y1 - 2012/1/9
N2 - <p>We demonstrate directed jetting from pulsed laser-induced cavities subjected to a burst of focused ultrasound. Alignment of the ultrasound focus and the pressure amplitudes in the vicinity of the cavity dictate the direction and length of the resulting jet, respectively. We interpret our observations in terms of radiation forces exerted on the cavity, due to the pressure gradient introduced to the ultrasound focus by its presence. We support our hypothesis with a linear analysis of the force distribution across the cavity surface, at the moment of maximum inflation, which shows reasonable predictive agreement with the observed jet characteristics. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3676414]</p>
AB - <p>We demonstrate directed jetting from pulsed laser-induced cavities subjected to a burst of focused ultrasound. Alignment of the ultrasound focus and the pressure amplitudes in the vicinity of the cavity dictate the direction and length of the resulting jet, respectively. We interpret our observations in terms of radiation forces exerted on the cavity, due to the pressure gradient introduced to the ultrasound focus by its presence. We support our hypothesis with a linear analysis of the force distribution across the cavity surface, at the moment of maximum inflation, which shows reasonable predictive agreement with the observed jet characteristics. (C) 2012 American Institute of Physics. [doi: 10.1063/1.3676414]</p>
KW - CAVITATION BUBBLES
KW - SHOCK-WAVE
KW - BOUNDARY
U2 - 10.1063/1.3676414
DO - 10.1063/1.3676414
M1 - Article
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 2
VL - 100
SP - -
ER -