Studies on the nonlinear evolution of the Richtmyer-Meshkov instability

Oren Sadot, L. Erez, Dan Oron, G. Erez, Gabriel Ben Dor, U. Alon, Lorenz Arye Levin, Dov Shvarts

Research output: Contribution to journalArticlepeer-review

Abstract

A statistical model predicting the evolution of turbulent mixing zone fronts was developed recently by
Alon et al. It suggests that the three physical elements that govern the Rayleigh-Taylor and RichtmyerMeshkov mixing zone evolution are the single-bubble evolution, the single-spike evolution, and the interaction between neighboring bubbles. In this paper we present an experimental investigation of these
three elements in the Richtmyer-Meshkov case. The experiments were performed in a double-diaphragm shock tube. The interface evolution was studied both before and after the arrival of a secondary reflected shock. Experimental results for the single-bubble and two-bubble cases show distinct bubble and spike
evolution. The results of the bubble competition, which determines the front evolution, were found to be in good agreement with both full numerical simulations and a simple potential flow model. These results strengthen the assumptions on which the statistical model is based.
Original languageEnglish
Pages (from-to)469-473
JournalAstrophysical Journal, Supplement Series
Volume127
StatePublished - 3 Aug 1999

Keywords

  • hydrodynamics
  • instabilities
  • shock waves
  • turbulence

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