Self-consistent, two-dimensional, magnetohydrodynamic simulations of magnetically driven flyer plates
Self-consistent, two-dimensional, magnetohydrodynamic simulations of magnetically driven flyer plates
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DOI：
10.1063/1.1557530
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发表时间：
2003-04
影响因子：
2.2
通讯作者：
R. Lemke;M. Knudson;A. Robinson;T. Haill;K. Struve;J. Asay;T. Mehlhorn
中科院分区：
文献类型：
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作者：
R. Lemke;M. Knudson;A. Robinson;T. Haill;K. Struve;J. Asay;T. Mehlhorn
20兆安Z电机产生的强磁场[R. B。Spielman等人，物理等离子体5，2105（1998）]被用作材料科学研究的压力源。我们详细研究的一个应用涉及使用强磁场将飞片（小金属盘）加速到非常高的速度（>20 km/s），用于冲击加载实验。我们已经使用二维（2D）磁流体动力学（MHD）模拟研究的物理加速飞片使用多兆巴磁驱动压力。一个典型的冲击物理负载由导电电极组成，这些电极在几兆巴的压力下是高度可压缩的。在电流脉冲的上升时间期间发生的电极变形导致显著的电感增加，这相对于静态几何形状降低了峰值电流（驱动压力）。这一重要的动态效应是自洽地模拟驱动磁流体模拟与acc.
The intense magnetic field generated by the 20 megaampere Z machine [R. B. Spielman et al., Phys. Plasmas 5, 2105 (1998)] at Sandia National Laboratories is being used as a pressure source for material science studies. An application we have studied in great detail involves using the intense magnetic field to accelerate flyer plates (small metal disks) to very high velocities (>20 km/s) for use in shock loading experiments. We have used two-dimensional (2D) magnetohydrodynamic (MHD) simulation to investigate the physics of accelerating flyer plates using multi-megabar magnetic drive pressures. A typical shock physics load is comprised of conducting electrodes that are highly compressible at multi-megabar pressures. Electrode deformation that occurs during the rise time of the current pulse causes significant inductance increase, which reduces the peak current (drive pressure) relative to a static geometry. This important dynamic effect is modeled self-consistently by driving the MHD simulation with an acc...