A secondary small-scale turbulent mixing phenomenon induced by shock-wave Mach-reflection slip-stream instability

A Rikanati, O Sadot, G Ben-Dor, D Shvarts, T Kuribayashi, K Takayama

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

Secondary small-scale Kelvin-Helmholtz instability, developing along the Mach reflection slip-stream, was investigated. This instability is the cause for thickening the slipstream. Growth rates of the large-scale Kelvin-Helmholtz shear flow instability are used to model the evolution of the slip-stream instability in ideal gas. The model is validated through experiments measuring the instability growth rates for a range of Mach numbers and reflecting wedge angles. Good agreement is found for Reynolds numbers of Re > 2 × 104 This work demonstrates, for the first time, the use of large-scale models of the Kelvin-Helmholtz instability in modeling secondary turbulent mixing in hydrodynamic flows, a methodology which could be further implemented in many important secondary mixing processes
Original languageEnglish
Title of host publicationShock Waves
EditorsK. Hannemann , F. Seiler
PublisherSpringer
Pages1347-1352
Number of pages6
ISBN (Electronic)978-3-540-85181-3
ISBN (Print)978-3-540-85180-6
DOIs
StatePublished - 2009

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