A general buoyancy-drag model for the evolution of the Rayleigh-Taylor and Richtmyer-Meshkov instabilities

Yair Srebro, Yoni Elbaz, Oren Sadot, Lior Arazi, Dov Shvarts

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

The growth of a single-mode perturbation is described by a buoyancy-drag equation, which describes all instability stages (linear, nonlinear and asymptotic) at time-dependent Atwood number and acceleration profile. The evolution of a multimode spectrum of perturbations from a short wavelength random noise is described using a single characteristic wavelength. The temporal evolution of this wavelength allows the description of both the linear stage and the late time self-similar behavior. Model results are compared to full two-dimensional numerical simulations and shock-tube experiments of random perturbations, studying the various stages of the evolution. Extensions to the model for more complicated flows are suggested.

Original languageEnglish
Pages (from-to)347-353
Number of pages7
JournalLaser and Particle Beams
Volume21
Issue number3
DOIs
StatePublished - 1 Sep 2003

Keywords

  • Buoyancy-drag model
  • Direct numerical simulation
  • Hydrodynamic instability
  • Shock tube experiment

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'A general buoyancy-drag model for the evolution of the Rayleigh-Taylor and Richtmyer-Meshkov instabilities'. Together they form a unique fingerprint.

Cite this