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- Title
A general buoyancydrag model for the evolution of the RayleighTaylor and RichtmyerMeshkov instabilities.
- Authors
YAIR SREBRO; YONI ELBAZ; OREN SADOT; LIOR ARAZI
- Abstract
The growth of a single-mode perturbation is described by a buoyancydrag equation, which describes all instability stages (linear, nonlinear and asymptotic) at time-dependent Atwood number and acceleration profile. The evolution of a multimode spectrum of perturbations from a short wavelength random noise is described using a single characteristic wavelength. The temporal evolution of this wavelength allows the description of both the linear stage and the late time self-similar behavior. Model results are compared to full two-dimensional numerical simulations and shock-tube experiments of random perturbations, studying the various stages of the evolution. Extensions to the model for more complicated flows are suggested.
- Subjects
QUANTUM perturbations; QUANTUM theory; RANDOM noise theory; STOCHASTIC processes; SIMULATION methods &; models
- Publication
Laser & Particle Beams, 2003, Vol 21, Issue 3, p347
- ISSN
0263-0346
- Publication type
Article
- DOI
10.1017/s0263034603213094