Physics of the single-shocked and reshocked Richtmyer-Meshkov instability

B. Thornber, D. Drikakis, D.L. Youngs, R.J.R. Williams

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

This paper presents a numerical study of a single-shocked turbulent mixing layer using high-order accurate implicit large-eddy simulations (ILES) for low- and high-amplitude (linear and non-linear) perturbations and for a reshocked turbulent layer. It investigates the differences in flow physics between these three cases, examining a recent proposition that single-shocked high-amplitude initial perturbations can be employed to model a reshocked turbulent layer. At early times, the shocked high-amplitude perturbation has high levels of mixing; however, at later times, it grows in an almost identical manner to the low-amplitude case. Despite exploration of several choices of scaling to map the reshocked results to the single-shocked study, a satisfactory agreement could not be reached and mixing parameters remain disparate. The conclusion is that a single-shock interaction with a high-amplitude perturbation is not a good representation of reshock of a turbulent mixing layer.
Original languageEnglish
Article number10
Pages (from-to)1-17
Number of pages17
JournalJournal of Turbulence
Volume13
DOIs
Publication statusPublished - 13 Apr 2012

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Physics
physics
perturbation
turbulent mixing
Large eddy simulation
large eddy simulation
shock
scaling
interactions

Keywords

  • Richtmyer–Meshkov instability
  • turbulent
  • mixing
  • implicit large eddy simulation
  • initial perturbation
  • low-amplitude
  • mixing parameters
  • turbulent layer
  • turbulent mixing layers
  • accuracy assessment
  • amplitude
  • flow stability
  • large eddy simulation
  • mixing ratio
  • perturbation
  • turbulent flow

Cite this

Thornber, B., Drikakis, D., Youngs, D. L., & Williams, R. J. R. (2012). Physics of the single-shocked and reshocked Richtmyer-Meshkov instability. Journal of Turbulence, 13, 1-17. [10]. https://doi.org/10.1080/14685248.2012.658916
Thornber, B. ; Drikakis, D. ; Youngs, D.L. ; Williams, R.J.R. / Physics of the single-shocked and reshocked Richtmyer-Meshkov instability. In: Journal of Turbulence. 2012 ; Vol. 13. pp. 1-17.
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Physics of the single-shocked and reshocked Richtmyer-Meshkov instability. / Thornber, B.; Drikakis, D.; Youngs, D.L.; Williams, R.J.R.

In: Journal of Turbulence, Vol. 13, 10, 13.04.2012, p. 1-17.

Research output: Contribution to journalArticle

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