Simulations of linear and nonlinear Rayleigh-Taylor instability under high Atwood numbers
- Purdue University, West, Lafayette, Indiana47907 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico87545 (United States)
Inertial confinement fusion (ICF) implosions, whether real or ideal, are subject to a variety of hydrodynamic instabilities that amplify small departures from spherical symmetry. Asymmetric implosions departing from spherical symmetry can lead to the breakup of the imploding shell or the creation of hydrodynamic turbulence. In an effort to understand the evolution of the asymmetries, perturbation {open_quotes}seeds{close_quotes} with both velocity and surface displacements have been introduced at the boundary of two different density media to model analytical Rayleigh-Taylor instability growth. Growth of perturbed amplitudes has been studied in linear and late-time nonlinear regimes. Simulated linear growth rates and nonlinear bubble velocities are in good agreement with theoretical values for Atwood numbers that are close to unity (relevant to ICF applications). {copyright} {ital 1997 American Institute of Physics.}
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 678779
- Report Number(s):
- CONF-970407--
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 406; ISSN 0094-243X; ISSN APCPCS
- Country of Publication:
- United States
- Language:
- English
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