Richtmyer-Meshkov instability in the turbulent regime

Journal Article · Mon Jun 12 00:00:00 EDT 1995 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.74.4855· OSTI ID:69303

Dimonte, G; Frerking, C E; Schneider, M ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)

We investigate the Richtmyer-Meshkov instability in the turbulent regime with three-dimensional random interfacial perturbations. Experiments are conducted on the Nova laser with strong radiatively driven shocks (Mach{gt}20) in planar, two-fluid targets. The mixing zone at the interface is found to increase in time as {ital h}{similar_to}{ital t}{sup {beta}} with {beta}{similar_to}0.6{plus_minus}0.1. Hydrodynamic simulations in 2D obtain similar values of {ital h} over the observation time, but with a larger exponent. A heuristic turbulent impulsive model is offered to identify the underlying processes.

• Research Organization: Lawrence Livermore National Laboratory
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 69303
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 74; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
HYDRODYNAMICS
INSTABILITY
INTERFACES
LASERS
MIXING
RANDOMNESS
SIMULATION
TURBULENCE