Acceleration and deceleration phase nonlinear Rayleigh-Taylor growth at spherical interfaces

Clark, D S; Tabak, M

doi:10.1103/PhysRevE.72.056308

Acceleration and deceleration phase nonlinear Rayleigh-Taylor growth at spherical interfaces

Journal Article · Fri Apr 08 04:00:00 EDT 2005 · Physical Review E

DOI:https://doi.org/10.1103/PhysRevE.72.056308· OSTI ID:877858

Clark, D S; Tabak, M

The Layzer model for the nonlinear evolution of bubbles in the Rayleigh-Taylor instability has recently been generalized to the case of spherically imploding interfaces [D. S. Clark and M. Tabak, to appear, PRE (2005).]. The spherical case is more relevant to, e.g., inertial confinement fusion or various astrophysical phenomena when the convergence is strong or the perturbation wavelength is comparable to the interface curvature. Here, the model is further extended to the case of bubble growth during the deceleration (stagnation) phase of a spherical implosion and to the growth of spikes during both the acceleration and deceleration phases. Differences in the nonlinear growth rates for both bubbles and spikes are found when compared with planar results. The model predictions are verified by comparison with numerical hydrodynamics simulations.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA

Sponsoring Organization:: USDOE

DOE Contract Number:: W-7405-ENG-48

OSTI ID:: 877858

Report Number(s):: UCRL-JRNL-211591

Journal Information:: Physical Review E, Journal Name: Physical Review E Journal Issue: 5 Vol. 72

Country of Publication:: United States

Language:: English

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