Jet-Like Long Spike in Nonlinear Evolution of Ablative Rayleigh-Taylor Instability

• 来源期刊: 中国物理快报(英文版)
• 年，卷（期）: 2010,（12）
• 页码范围: 139-142
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/27/12/125203

摘要

We report the formation of jet-like long spike in the nonlinear evolution of the ablative Rayleigh-Taylor instability(ARTI)experiments by numerical simulations.A preheating model k(T)= kSH[1+f(T)],where kSH is the Spitzer-Harm(SH)electron conductivity and f(T)interprets the preheating tongue effect in the cold plasma ahead of the ablative front[Phys.Rev.E 65(2002)57401],is introduced in simulations.The simulation results of the nonlinear evolution of the ARTI are in general agreement with the experiment results.It is found that two factors,i.e.,the suppressing of ablative Kelvin-Helmholtz instability(AKHI)and the heat flow cone in the spike tips,contribute to the formation of jet-like long spike in the nonlinear evolution of the ARTI.