Z箍缩丝阵烧蚀的简单模型数值模拟(英文)  

Numerical modeling of Z-pinch wire array ablation with a simple model

作　　者：李晶[1] 杨礼兵[1] 黄显宾[1] 谢卫平[1] 段书超[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《强激光与粒子束》2012年第1期84-88,共5页High Power Laser and Particle Beams

基　　金：Supported by National Natural Science Foundation of China(10635050)

摘　　要：丝阵烧蚀在丝阵Z箍缩动力学中扮有重要角色,透彻理解丝阵烧蚀对于丝阵Z箍缩动力学的研究至关重要。采用简单模型数值模拟了烧蚀过程,该模型物理上采用绝热、单流体、单相、磁流体力学近似,数值上采用欧拉法结合保单调输运格式来离散。数值结果很好地展示了烧蚀过程的主要特征,例如芯-冕结构、径向等离子体流、轴线上先驱等离子体柱的形成、静止丝芯的长寿命以及延长的烧蚀期,一些关键时间参数定量或定性地相符于文献报道的实验和数值结果,例如冕等离子体角向融合的时刻、等离子体首次到达轴线的时刻、丝芯静止持续的时间、最后的箍缩滞止时刻,但某些方面略有差异。A good understanding of Z-pinch wire array ablation is of critical importance to the study of the dynamics of the wire array Z-pinch.To model the ablation process,a two-dimensional（2D） magnetohydrodynamics（MHD） program called FOI has been developed.The ablation is approximated in an adiabatic single-fluid single-phase MHD framework.Eulerian computation is adopted with a monotonic advection scheme.The numerical results obtained from FOI successfully qualitatively demonstrate the primary aspects of the ablation process,such as the core-corona structure,radial plasma streams,the formation of an on-axis precursor plasma column,longevity of the stationary wire cores and the extended ablation phase,though some discrepancies are observed.

关 键 词：Z箍缩 烧蚀 磁流体力学 数值模拟 

分 类 号：O532[理学—等离子体物理] O411[理学—物理]