Shock bowing and vorticity dynamics during propagation into different transverse density profiles

K. Kremeyer, S. Nazarenko, A. C. Newell

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

A 2D numerical investigation is presented of shock wave propagation into a gas whose density is modulated in the transverse direction across the width of a shock tube. These density modulations represent temperature distributions in which low density corresponds to high temperature gas and high density corresponds to low temperature gas. This work is motivated by recent shock-plasma experiments, and mechanisms to explain the experimentally observed shock "splitting" signatures are investigated. It is found that the shock splitting signatures are more pronounced when the shock wave is more strongly curved or bowed. This occurs as the depth of the initial density profile is increased. The gross features of the shock splitting signatures are relatively insensitive to variations in the shape of the initial density profile (into which the shock propagates). Several interesting features of vorticity production and evolution are also indicated.

Original languageEnglish (US)
Pages (from-to)150-165
Number of pages16
JournalPhysica D: Nonlinear Phenomena
Volume163
Issue number3-4
DOIs
StatePublished - Mar 15 2002

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Keywords

  • Curved shock
  • Jet
  • Richtmyer-Meshkov instability
  • Vorticity

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Mathematical Physics
  • Condensed Matter Physics
  • Applied Mathematics

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