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The effect of a short wavelength mode on the evolution of a long wavelength perturbation driven by a strong blast wave [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2004.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
PDF-file: 48 pages; size: 2.7 Mbytes
Additional Creators
Lawrence Berkeley National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Shock-accelerated material interfaces are potentially unstable to both the Richtmyer-Meshkov and Rayleigh-Taylor instabilities. Shear that develops along with these instabilities in turn drives the Kelvin-Helmholtz instability. When driven by strong shocks, the evolution and interaction of these instabilities is further complicated by compressibility effects. In this paper, we present a computational study of the formation of jets at strongly driven hydrodynamically unstable interfaces, and the interaction of these jets with one another and with developing spikes and bubbles. This provides a nonlinear spike-spike and spike-bubble interaction mechanism that can have a significant impact on the large-scale characteristics of the mixing layer. These interactions result in sensitivity to the initial perturbation spectrum, including the relative phases of the various modes, that persists long into the nonlinear phase of instability evolution. We describe implications for instability growth rates, the bubble merger process, and the degree of mix in the layer. Finally, we consider results from relevant deceleration RT experiments, performed on OMEGA, to demonstrate some of these effects.
Report Numbers
E 1.99:ucrl-jrnl-202985
ucrl-jrnl-202985
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Note
Published through SciTech Connect.
03/16/2004.
"ucrl-jrnl-202985"
Published in: Physics of Plasmas, vol. 11, no. 12, December 1, 2004, pp. 5507-5519 11 12 ISSN 1070-664X; PHPAEN FT
Hansen, J F; Drake, R P; Edwards, M; Robey, H F; Miles, A R; Blue, B; Leibrandt, D R; Kuranz, C.
Funding Information
W-7405-ENG-48
View MARC record | catkey: 13823595