Long-term effect of Rayleigh-Taylor stabilization on converging Richtmyer-Meshkov instability

Xisheng Luo, Fu Zhang, Juchun DIng, Ting Si, Jiming Yang, Zhigang Zhai, Chih-yung Wen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

24 Citations (Scopus)

Abstract

The Richtmyer-Meshkov instability on a three-dimensional single-mode light/heavy interface is experimentally studied in a converging shock tube. The converging shock tube has a slender test section so that the non-uniform feature of the shocked flow is amply exhibited in a long testing time. A deceleration phenomenon is evident in the unperturbed interface subjected to a converging shock. The single-mode interface presents three-dimensional characteristics because of its minimum surface feature, which leads to the stratified evolution of the shocked interface. For the symmetry interface, it is quantitatively found that the perturbation amplitude experiences a rapid growth to a maximum value after shock compression and finally drops quickly before the reshock. This quick reduction of the interface amplitude is ascribed to a significant Rayleigh-Taylor stabilization effect caused by the deceleration of the light/heavy interface. The long-term effect of the Rayleigh-Taylor stabilization even leads to a phase inversion on the interface before the reshock when the initial interface has sufficiently small perturbations. It is also found that the amplitude growth is strongly suppressed by the three-dimensional effect, which facilitates the occurrence of the phase inversion.
Original languageEnglish
Pages (from-to)231-244
Number of pages14
JournalJournal of Fluid Mechanics
Volume849
DOIs
Publication statusPublished - 25 Aug 2018

Keywords

  • compressible flows
  • shock waves

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this