强激光与粒子束, 2012, 24 (1): 84, 网络出版: 2012-02-14
Z箍缩丝阵烧蚀的简单模型数值模拟
Numerical modeling of Z-pinch wire array ablation with a simple model
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。
Abstract
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.
李晶, 杨礼兵, 黄显宾, 谢卫平, 段书超. Z箍缩丝阵烧蚀的简单模型数值模拟[J]. 强激光与粒子束, 2012, 24(1): 84. Li Jing, Yang Libing, Huang Xianbin, Xie Weiping, Duan Shuchao. Numerical modeling of Z-pinch wire array ablation with a simple model[J]. High Power Laser and Particle Beams, 2012, 24(1): 84.