Numerical investigation of nonlinear ablative single-mode Rayleigh?Taylor instability in the presence of preheating
作者： L F Wang , W H Ye , W Y Zhang , X T He
DOI: 10.1088/0031-8949/2013/T155/014018
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摘要: Nonlinear ablative single-mode Rayleigh–Taylor instability (RTI) with weak and strong preheatings has been investigated numerically. The numerical results for the linear growth rates obtained are in general agreement a self-consistent stability analysis (Goncharov et al 1996 Phys. Plasmas 3 4665). effects of preheating on RTI (ARTI) shown to reduce its rate mitigate weakly nonlinear growth. It was found that evolution ARTI is strongly dependent intensity perturbation wavelength. There three typical wavelength perturbations ARTI. In preheating, short-wavelength spike can be ruptured highly regime middle/long-wavelength Kelvin–Helmholtz mushroom-shaped patterns appear at heads. middle-wavelength perturbation, jet-like spikes formed though still classical (without thermal conductivity) counterpart. summary, our studies indicate have pronounced influence evolutions Thus, it should included applications where plays vital role, such as inertial confinement fusion implosions supernova explosions.
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