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Particle motion induced by bubble cavitation

Poulain, Stéphane and Guenoun, Gabriel and Gart, Sean and Crowe, William and Jung, Sunghwan Particle motion induced by bubble cavitation. (2015) Physical review letters, 114 (21). ISSN 0031-9007

(Document in English)

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Cavitation bubbles induce impulsive forces on surrounding substrates, particles, or surfaces. Even though cavitation is a traditional topic in fluid mechanics, current understanding and studies do not capture the effect of cavitation on suspended objects in fluids. In the present work, the dynamics of a spherical particle due to a cavitation bubble is experimentally characterized and compared with an analytical model. Three phases are observed: the growth of the bubble where the particle is pushed away, its collapse where the particle approaches the bubble, and a longer time scale postcollapse where the particle continues to move toward the collapsed bubble. The particle motion in the longer time scale presumably results from the asymmetric cavitation evolution at an earlier time. Our theory considering the asymmetric bubble dynamics shows that the particle velocity strongly depends on the distance from the bubble as an inverse-fourth-power law, which is in good agreement with our experimentation. This study sheds light on how small free particles respond to cavitation bubbles in fluids.

Item Type:Article
Additional Information:Thanks to American Physical Society editor. The definitive version is available at http://www.aps.org/ The original PDF of the article can be found at Physical Review Letters : http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.214501/00406031
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Ecole Normale Supérieure de Cachan - ENS Cachan (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Virginia Polytechnic Institute and State University (USA)
Laboratory name:
National Science Foundation
Deposited On:22 Jun 2015 08:14

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