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Title: Oscillations of a standing shock wave generated by the Richtmyer-Meshkov instability

Journal Article · · Physical Review Fluids
 [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

In a typical Richtmyer-Meshkov experiment a fast moving flat shock strikes a stationary perturbed interface between fluids A and B creating a transmitted and a reflected shock, both of which are perturbed. We propose shock tube experiments in which the reflected shock is stationary in the laboratory. Such a standing perturbed shock undergoes well-known damped oscillations. We present the conditions required for producing such a standing shock wave, which greatly facilitates the measurement of the oscillations and their rate of damping. We define a critical density ratio Rcritical, in terms of the adiabatic indices of the two fluids, and a critical Mach number Mcriticals of the incident shock wave, which produces a standing reflected wave. If the initial density ratio R of the two fluids is less than Rcritical then a standing shock wave is possible at Ms=Mcriticals. Otherwise a standing shock is not possible and the reflected wave always moves in the direction opposite the incident shock. Examples are given for present-day operating shock tubes with sinusoidal or inclined interfaces. We consider the effect of viscosity, which affects the damping rate of the oscillations. Furthermore, we point out that nonlinear bubble and spike amplitudes depend relatively weakly on the viscosity of the fluids and that the interface area is a better diagnostic.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1297656
Alternate ID(s):
OSTI ID: 1262445
Report Number(s):
LLNL-JRNL-681121
Journal Information:
Physical Review Fluids, Vol. 1, Issue 3; ISSN 2469-990X
Publisher:
APSCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

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Cited By (4)

Evaluation of turbulent mixing transition in a shock-driven variable-density flow journal October 2017
Interaction of planar shock wave with three-dimensional heavy cylindrical bubble journal October 2018
Linear theory of Richtmyer–Meshkov like flows journal November 2016
Analytical scalings of the linear Richtmyer-Meshkov instability when a rarefaction is reflected journal July 2017

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