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Energy focusing in shock-collapsed bubble arrays

Bempedelis, N; Ventikos, Y; (2020) Energy focusing in shock-collapsed bubble arrays. Journal of Fluid Mechanics , 900 , Article A44. 10.1017/jfm.2020.535. Green open access

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Abstract

During its collapse a bubble can draw and concentrate energy from its surroundings. In the present work, we investigate the behaviour of certain multibubble configurations that have the potential for achieving significant levels of energy focusing. The dynamics of these configurations are studied for the first time in three dimensions, and are shown to be significantly different from those in two dimensions. Novel observations regarding focusing regimes in collapsing arrays are presented. Finally, through a series of numerical experiments on previously unexplored arrangements, we demonstrate that substantially enhanced levels of energy concentration can be achieved.

Type: Article
Title: Energy focusing in shock-collapsed bubble arrays
Open access status: An open access version is available from UCL Discovery
DOI: 10.1017/jfm.2020.535
Publisher version: https://doi.org/10.1017/jfm.2020.535
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: bubble dynamics, gas/liquid flow
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10109229
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