Mechanism of high velocity jet formation after a gas bubble collapse near the micro fiber immersed in a liquid

Roman V. Fursenko, Vladimir M. Chudnovskii, Sergey S. Minaev, Junnosuke Okajima

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Numerical simulations of the vapor bubble collapse near the micro fiber immersed in a subcooled liquid allow us to propose the mechanism of formation of high velocity liquid jet previously observed in experiments. It is shown that spherical symmetry breaking of the velocity field near the fiber creates axisymmetric radially converged water flow resulting in appearance of the cumulative jet. Numerical simulations demonstrate that physical mechanism of jet formation is mainly determined by bubble surface dynamic and is irrespective to the processes driving bubble shrinking. Dependency of the jet velocity on time as well as effect of fiber thickness and initial vapor bubble radius on jet intensity are studied. It is found that optimal fiber thickness at which the jet is the most powerful exists. This optimal value is not universal but depends on initial vapor bubble radius.

Original languageEnglish
Article number120420
JournalInternational Journal of Heat and Mass Transfer
Volume163
DOIs
Publication statusPublished - 2020 Dec

Keywords

  • Bubble collapse
  • Condensation
  • High velocity cumulative jet
  • Laser surgery
  • Two-phase flow

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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