Journal ArticleDOI
Instability of a contact surface driven by a nonuniform shock wave
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In this article, a uniform contact surface is found to be unstable after a non-uniform shock passes across it, and the physical mechanism of the instability is qualitatively discussed.Abstract:
Stability of a uniform contact surface is investigated in the case when a nonuniform shock wave passes through the surface. The nonuniform shock is generated by a rippled piston that moves with constant velocity. The amplitude of the shock oscillates and decreases as it propagates. A uniform contact surface is found to be unstable after the nonuniform shock passes across it. The growth rate depends sensitively on the phase of the oscillating shock wave at the time when the shock hits the contact surface. The physical mechanism of the instability is qualitatively discussed. The linear and nonlinear evolutions of the instability are studied. In particular, the dependence of the linear case on the Atwood number for a weak shock is investigated. Properties of this stability are found to exhibit differences from those of the standard Richtmyer-Meshkov instability in both the linear and nonlinear cases. {copyright} {ital 1996 The American Physical Society.}read more
Citations
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Turbulent mixing and transition criteria of flows induced by hydrodynamic instabilities
Ye Zhou,Timothy T. Clark,Daniel S. Clark,S. Gail Glendinning,M. Aaron Skinner,Channing Huntington,Omar Hurricane,Andris Dimits,Bruce Remington +8 more
TL;DR: In this paper, the authors present a pedagogical review of hydrodynamic instability-induced turbulent flows, including Rayleigh-Taylor, Richtmyer-Meshkov, and Kelvin-Helmholtz instabilities.
Journal ArticleDOI
Richtmyer-Meshkov instability: theory of linear and nonlinear evolution
Katsunobu Nishihara,J. G. Wouchuk,Chihiro Matsuoka,R. Ishizaki,Vasily Zhakhovsky,Vasily Zhakhovsky +5 more
TL;DR: A theoretical framework to study linear and nonlinear Richtmyer–Meshkov instability (RMI) and its stabilization mechanisms are presented via molecular dynamics simulations for planar and cylindrical geometries, where the generation of vorticity even in viscid materials is shown.
Journal Article
Turbulent Mixing and Transition Criteria of Flows Induced by Hydrodynamic Instabilities
TL;DR: In this paper, a pedagogical review of hydrodynamic instability-induced turbulent flows is presented, with a focus on the initial conditions of such flows and accurately predicting the transitional flows.
Journal ArticleDOI
Richtmyer–Meshkov-like instabilities and early-time perturbation growth in laser targets and Z-pinch loads
Alexander L. Velikovich,Jill P. Dahlburg,Andrew J. Schmitt,John H. Gardner,Lee Phillips,F. L. Cochran,Y. K. Chong,Guy Dimonte,N. Metzler +8 more
TL;DR: In this paper, a large family of Richtmyer-Meshkov-like hydrodynamic interfacial instabilities is discussed, and the early-time perturbation behavior can be controlled by tailoring the density profile of a laser target or a Z-pinch load.
Journal ArticleDOI
Saturation of perturbation growth in ablatively driven planar laser targets
TL;DR: Saturation of the mass variation growth during the shock transit time, theoretically predicted for the surface roughness case by Ishizaki and Nishihara [Phys. Rev. Lett. 78, 1920 (1997)] and for the laser imprint case by Taylor et al. as mentioned in this paper, is studied analytically and numerically.
References
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Journal ArticleDOI
Instability of the interface of two gases accelerated by a shock wave
TL;DR: In this paper, an experimental study of the stability of the interface of two gases traversed by ash-wave was conducted and it was found that the interface is unstable both in the case of shock wave passage from the lighter to the heavier gas and for passage in the opposite direction.
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Dynamic Behavior of Rippled Shock Waves and Subsequently Induced Areal-Density-Perturbation Growth in Laser-Irradiated Foils
Takuma Endo,Keisuke Shigemori,Hiroshi Azechi,A. Nishiguchi,K. Mima,Masugu Sato,M. Nakai,S. Nakaji,N. Miyanaga,S. Matsuoka,A. Ando,Kokichi Tanaka,Sumiko Nakai +12 more
TL;DR: It has been found that the growth of the areal-density perturbation prior to shock breakout is due predominantly to the rippled-shock propagation.
Journal ArticleDOI
Rayleigh--Taylor instability on the pusher--fuel contact surface of stagnating targets
TL;DR: In this article, the Rayleigh-Taylor instability on the pusher-fuel contact surface in the deceleration phase of implosion is investigated in cylindrical geometry using a two-dimensional fluid code.
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Experimental and theoretical study of the stability of plane shock waves reflected normally from perturbed flat walls
M. G. Briscoe,A. A. Kovitz +1 more
TL;DR: In this article, the rate of damping of perturbations on a plane shock wave reflected from a perturbed flat wall was measured in a shock tube and compared with a modified form of a linearized theory due to Zaidel (1960).