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2-D viscous magnetohydrodynamics simulation of plasma armatures with the CE/SE method
  • ISSN号:1001-6538
  • 期刊名称:科学通报(英文版)
  • 时间:0
  • 页码:1641-1647
  • 语言:中文
  • 分类:O53[理学—等离子体物理;理学—物理] TK730.1[交通运输工程—轮机工程;动力工程及工程热物理—流体机械及工程]
  • 作者机构:[1]National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China
  • 相关基金:Supported by the Nationa/ Natural Science Foundation of China (Grant No. 10672080)
  • 相关项目:多管PDE管外复杂波系特性的研究
中文摘要:

可能的 A 二维粘滞磁电机水动力学(MHD ) 模型被用于在一支栏杆枪中调查血浆盔甲。为解决联合海军司烧方程和麦克斯韦方程的时空保存元素和答案元素(CE/SE ) 方法被设计。血浆的物理参数的分布可以因此被评估。极其高的压力能总是在射弹前被观察的结果表演,和 Lorentz 力量是主要推进。温度的分发被放射的法律在边界在与结果的一个好协议预言。由于传送对流,速度的发行量模式在两个是明显的在胶粘、粘滞的效果考虑的案例。而且,速度和加速随着时间的过去震荡直到一个新稳定的状态被完成。这个模型高效地捕获物理现象的突出的特征,并且在血浆盔甲贡献 MHD 问题的进一步的研究。

英文摘要:

A possible two-dimensional viscous magnetohydrodynamics (MHD) model is applied to investigating the plasma armature in a railgun. The space-time conservation element and solution element (CE/SE) method for solving the coupled Navier-Stokes equations and Maxwell equations was devised. The distributions of physical parameters of the plasma may thus be evaluated. The results show that extremely high pressure can always be observed ahead of the projectile, and the Lorentz force is the main propulsion. The distribution of temperature is in a good agreement with the results predicted by the law of radiation at the boundaries. Due to convection, the circulation patterns of velocity are evident in both the cases considering inviscid and viscous effect. Furthermore, the velocity and acceleration oscillate over time until a new steady state is achieved. This model efficiently captures the salient features of the physical phenomena, and contributes to further studies of MHD problems in plasma armature.

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