Turbulent mixing and transition criteria of flows induced by hydrodynamic instabilities

In diverse areas of science and technology, including inertial confinement fusion (ICF), astrophysics, geophysics, and engineering processes, turbulent mixing induced by hydrodynamic instabilities is of scientific interest as well as practical significance. Because of the fundamental roles they ofte...

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Veröffentlicht in:Physics of plasmas 2019-08, Vol.26 (8)
Hauptverfasser: Zhou, Ye, Clark, Timothy T., Clark, Daniel S., Gail Glendinning, S., Aaron Skinner, M., Huntington, Channing M., Hurricane, Omar A., Dimits, Andris M., Remington, Bruce A.
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container_end_page
container_issue 8
container_start_page
container_title Physics of plasmas
container_volume 26
creator Zhou, Ye
Clark, Timothy T.
Clark, Daniel S.
Gail Glendinning, S.
Aaron Skinner, M.
Huntington, Channing M.
Hurricane, Omar A.
Dimits, Andris M.
Remington, Bruce A.
description In diverse areas of science and technology, including inertial confinement fusion (ICF), astrophysics, geophysics, and engineering processes, turbulent mixing induced by hydrodynamic instabilities is of scientific interest as well as practical significance. Because of the fundamental roles they often play in ICF and other applications, three classes of hydrodynamic instability-induced turbulent flows—those arising from the Rayleigh-Taylor, Richtmyer-Meshkov, and Kelvin-Helmholtz instabilities—have attracted much attention. ICF implosions, supernova explosions, and other applications illustrate that these phases of instability growth do not occur in isolation, but instead are connected so that growth in one phase feeds through to initiate growth in a later phase. Essentially, a description of these flows must encompass both the temporal and spatial evolution of the flows from their inception. Hydrodynamic instability will usually start from potentially infinitesimal spatial perturbations, will eventually transition to a turbulent flow, and then will reach a final state of a true multiscale problem. Indeed, this change in the spatial scales can be vast, with hydrodynamic instability evolving from just a few microns to thousands of kilometers in geophysical or astrophysical problems. These instabilities will evolve through different stages before transitioning to turbulence, experiencing linear, weakly, and highly nonlinear states. The challenges confronted by researchers are enormous. The inherent difficulties include characterizing the initial conditions of such flows and accurately predicting the transitional flows. Of course, fully developed turbulence, a focus of many studies because of its major impact on the mixing process, is a notoriously difficult problem in its own right. In this pedagogical review, we will survey challenges and progress, and also discuss outstanding issues and future directions.
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subjects 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Astrophysics
Evolution
Explosions
Fluid dynamics
Geophysics
Implosions
Inertial confinement fusion
Initial conditions
Kelvin-Helmholtz instability
Plasma physics
Turbulence
Turbulent flow
Turbulent mixing
title Turbulent mixing and transition criteria of flows induced by hydrodynamic instabilities
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