Three-dimensional z-pinch wire array modeling with ALEGRA-HEDP
Three-dimensional z-pinch wire array modeling with ALEGRA-HEDP
复制标题
DOI：
10.1016/j.cpc.2004.06.054
复制
发表时间：
2003-09
期刊：
影响因子：
--
通讯作者：
A. Robinson;C. Garasi
中科院分区：
文献类型：
--
作者：
A. Robinson;C. Garasi
对z-捏线阵列爆炸和坍缩动力学的理解对脉冲功率惯性约束聚变实验的发展和未来具有重要意义。实验结果清楚地显示了金属丝爆炸和坍塌过程的极端三维性质。这一过程的物理性质可以用热输运和辐射输运模型增强的电阻磁流体动力学方程来近似描述。Z-pinch MHD物理主要由材料区域主导，当材料从固体穿过熔体进入等离子体状态时，其导电性会发生巨大变化。同时，导线之间的空隙区域被建模为电导率非常低的区域。这种具有挑战性的物理情况需要一个复杂的三维建模方法，与足够的计算资源相匹配，以在预测建模和提高物理理解方面取得进展。
An understanding of the dynamics of z-pinch wire array explosion and collapse is of critical interest to the development and future of pulsed power inertial confinement fusion experiments. Experimental results clearly show the extreme three-dimensional nature of the wire explosion and collapse process. The physics of this process can be approximated by the resistive magnetohydrodynamic (MHD) equations augmented by thermal and radiative transport modeling. Z-pinch MHD physics is dominated by material regions whose conductivity properties vary drastically as material passes from solid through melt into plasma regimes. At the same time void regions between the wires are modeled as regions of very low conductivity. This challenging physical situation requires a sophisticated three-dimensional modeling approach matched by sufficient computational resources to make progress in predictive modeling and improved physical understanding.