Shock emission from collapsing gas bubbles

S. J. Shaw, P. D.M. Spelt

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

The origin and the resultant properties of the strong pulses or shocks emitted by collapsing gas bubbles into a surrounding liquid are investigated numerically. The compressible flow in both phases is resolved. Results are presented for micron-and millimetre-sized bubbles and for bubble collapse triggered either by an acoustic driving or by an initially imposed spherical shock in the liquid. The origin of the diverging shocks is investigated, and the results of a parametric study for the acoustically driven collapse reveal a predominant linear dependence of the shock strength and width on the maximum bubble radius. The results compare favourably with experimental data and agree well with acoustic theory in the limit of weak forcing.

Original languageEnglish
Pages (from-to)363-373
Number of pages11
JournalJournal of Fluid Mechanics
Volume646
DOIs
Publication statusPublished - 10 Mar 2010

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