Directed jetting from collapsing cavities exposed to focused ultrasound

B. Gerold, P. Glynne-Jones, C. McDougall, D. McGloin, S. Cochran, A. Melzer, P. Prentice

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    Abstract

    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]

    Original languageEnglish
    Article number024104
    Pages (from-to)-
    Number of pages3
    JournalApplied Physics Letters
    Volume100
    Issue number2
    DOIs
    Publication statusPublished - 9 Jan 2012

    Keywords

    • CAVITATION BUBBLES
    • SHOCK-WAVE
    • BOUNDARY

    Cite this

    Gerold, B., Glynne-Jones, P., McDougall, C., McGloin, D., Cochran, S., Melzer, A., & Prentice, P. (2012). Directed jetting from collapsing cavities exposed to focused ultrasound. Applied Physics Letters, 100(2), -. [024104]. https://doi.org/10.1063/1.3676414