Mach number effects on shock-bubble interaction

A. Bagabir, D. Drikakis

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

An investigation of Mach number effects on the interaction of a shock wave with a cylindrical bubble, is presented. We have conducted simulations with the Euler equations for various incident shock Mach numbers (MS) in the range of 1.22 ≤ Ms ≤ 6, using high-resolution Godunov-type methods and an implicit solver. Our results are found in a very good agreement with previous investigations and further reveal additional gasdynamic features with increasing the Mach number. At higher Mach numbers larger deformations of the bubble occur and a secondary-reflected shock wave arises upstream of the bubble. Negative vorticity forms at all Mach numbers, but the "c-shaped" vortical structure appeared at MS = 1.22 gives its place to a circular-shaped structure at higher Mach numbers. The computations reveal that the (instantaneous) displacements of the upstream, downstream and jet interfaces are not significantly affected by the incident Mach number for values (approximately) greater than MS = 2.5. With increasing the incident Mach number, the speed of the jet (arising from the centre of the bubble during the interaction) also increases.
Original languageEnglish
Pages (from-to)209-218
Number of pages10
JournalShock Waves
Volume11
Issue number3
DOIs
Publication statusPublished - 1 Sep 2001

Keywords

  • bubble
  • compressible flow
  • mixing
  • shock waves
  • turbulence
  • vorticity
  • Mach number
  • cylindrical bubble
  • Godunov-type methods
  • implicit solver
  • negative vorticity

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