Numerical Simulation of Anisotropic Preheating Ablative Rayleigh-Taylor Instability

作     者：王立锋 叶文华 李英骏 WANG Li-Feng;YE Wen-Hua;LI Ying-Jun

作者机构：Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics Beijing 100088 Department of Physics Zhejiang University Hangzhou 310028 Center for Applied Physics and Technology Peking University Beijing 100871 State Key Laboratory for GeoMechanics and Deep Underground Engineering China University of Mining and Technology Beijing 100083 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2010年第27卷第2期

页      面：176-179页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：国家973计划 国家教育部高等学校博士学科点专项科研基金 国家自然科学基金 

主　　题：Fluid dynamics Plasma physics 

摘      要：The linear growth rate of the anisotropic preheating ablative Rayleigh-Taylor instability （ARTI） is studied by numerical simulations. The preheating model κ （T）=κSH [1＋f（T）] is applied, where f（T） is the preheating function interpreting the preheating tongue effect in the cold plasma ahead of the ablative front. An arbitrary coefficient D is introduced in the energy equation to study the influence of transverse thermal conductivity on the growth of the ARTI. We find that enhancing diffusion in a plane transverse to the mean longitudinal flow can strongly reduce the growth of the instability. Numerical simulations exhibit a significant stabilization of the ablation front by improving the transverse thermal conduction. Our results are in general agreement with the theory analysis and numerical simulations by Masse [Phys. Rev. Lett. 98 （2007） 245001].