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Computational modeling of classical and ablative Rayleigh–Taylor instabilities

Published online by Cambridge University Press:  17 May 2001

W.M. WOOD-VASEY ,
K.S. BUDIL ,
B.A. REMINGTON ,
S.G. GLENDINNING ,
A.M. RUBENCHIK ,
M. BERNING ,
J.O. KANE  and
J.T. LARSEN
W.M. WOOD-VASEY
Affiliation:
Harvey Mudd College, Claremont, CA 91711 Current address: Department of Physics, University of California at Berkeley, Berkeley, CA 942720, USA
K.S. BUDIL
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
B.A. REMINGTON
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
S.G. GLENDINNING
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
A.M. RUBENCHIK
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
M. BERNING
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
J.O. KANE
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
J.T. LARSEN
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550
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Abstract

Modeling plus simulations using the one-dimensional Lagrangian radiation-hydrodynamics code HYADES are compared with data from classical and ablative Rayleigh–Taylor experiments conducted on the Nova laser. Comparisons between the experiments and modeling for both the gross hydrodynamic motion and the perturbation evolution are made and show good agreement. A third order perturbation analysis is applied to demonstrate the onset of nonlinearity. A simple, physically intuitive saturation model is used to describe the growth further into the nonlinear regime. Finally, we present the first comparison of the Betti ablation front theory with indirect-drive RT data and obtain good agreement.

Keywords

LinearModelingNonlinearRayleigh–Taylor instability
Type
Research Article
Information
Laser and Particle Beams , Volume 18 , Issue 4 , October 2000 , pp. 583 - 593
Copyright
© 2000 Cambridge University Press

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