Oblique shocks and the combined Rayleigh--Taylor, Kelvin--Helmholtz, and Richtmyer--Meshkov instabilities

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Physics of Fluids; (United States)

DOI:https://doi.org/10.1063/1.868198· OSTI ID:7281173

Mikaelian, K O ^[1]

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1. University of California, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

This Letter considers the evolution of perturbations at an interface between two fluids subjected to an oblique shock. The normal component of the shock generates the Richtmyer--Meshkov (RM) instability, and the parallel component generates the Kelvin--Helmholtz (KH) instability. If a constant normal acceleration is also present it induces the Rayleigh--Taylor (RT) instability or, depending on the sign of [ital gA] ([ital g]=acceleration, [ital A]=Atwood number), it acts to stabilize the KH and RM instabilities. Treating the shock as an instantaneous acceleration, analytic formulas are derived for the evolution of the perturbations. This Letter illustrates with an application to inertial-confinement-fusion capsules.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7281173
• Journal Information: Physics of Fluids; (United States), Journal Name: Physics of Fluids; (United States) Vol. 6:6; ISSN 1070-6631; ISSN PHFLE6
• Country of Publication: United States
• Language: English

Related Subjects

661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
COMPRESSIBLE FLOW
CONFINEMENT
FLUID FLOW
HELMHOLTZ INSTABILITY
INERTIAL CONFINEMENT
INSTABILITY
PLASMA CONFINEMENT
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
RAYLEIGH-TAYLOR INSTABILITY
SHOCK WAVES