Turbulent transition of a gaseous mixing zone induced by the Richtmyer-Meshkov instability
نویسندگان
چکیده
منابع مشابه
The Richtmyer-meshkov Instability
■ Abstract The Richtmyer-Meshkov instability arises when a shock wave interacts with an interface separating two different fluids. It combines compressible phenomena, such as shock interaction and refraction, with hydrodynamic instability, including nonlinear growth and subsequent transition to turbulence, across a wide range of Mach numbers. This review focuses on the basic physical processes ...
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Experiments to study the mixing between two gases induced by the RichtmyerMeshkov instability are performed in a vertical shock tube of large, square internal cross section. The test gas is contained in an axisymmetric soap bubble which is at rest on an injector and is seeded with smoke to perform planar Mie scattering. Concurrently to the laboratory experiments, a computational investigation i...
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30 LLE Review, Volume 77 In inertial confinement fusion (ICF) implosions, a laser irradiation induces a shock wave propagating through the target. During the shock transit time, the ablation front travels at a constant velocity, and any surface perturbations could grow due to the Richtmyer-Meshkov (RM)–like instability.1–5 Later, when a rarefaction wave reaches the ablation surface, the acceler...
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We report analytical and numerical results describing the dynamics of the two-dimensional coherent structure of bubbles and spikes in the Richtmyer-Meshkov instability for fluids with a finite density ratio. The theory accounts for the non-local properties of the interface evolution, and the simulations treat the interface as a discontinuity. Good agreement between the analytical and numerical ...
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ژورنال
عنوان ژورنال: Physical Review Fluids
سال: 2020
ISSN: 2469-990X
DOI: 10.1103/physrevfluids.5.024101