Computer studies on the spontaneous fast reconnection evolution in various physical situations
Computer studies on the spontaneous fast reconnection evolution in various physical situations
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各种物理情况下自发快速重连接演化的计算机研究
DOI：
10.1063/1.1360212
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发表时间：
2001
影响因子：
2.2
通讯作者：
K. Kondoh
中科院分区：
文献类型：
--
作者：
M. Ugai;K. Kondoh
研究了长电流片系统在不同物理条件下的自发快速重联演化，其中电流驱动异常电阻率的阈值随热速度的增加而增加.在低β等离子体中，如果初始阈值VC 0足够大，则快速重联机制可以完全建立;另一方面，如果VC 0太小，在通常情况下很容易出现异常电阻率，则所产生的扩散区显著延长，使得重联过程变得不那么有效。在环境磁场区，等离子体β对快速重联演化有很强的影响，等离子体β足够小是快速重联机制爆发性演化的必要条件。事实上，只有在低β等离子体中，所涉及的磁张力才在整个系统动力学和剧烈的磁能释放中起主导作用。它还表明，...
The spontaneous fast reconnection evolution is studied in a long current sheet system in various physical situations, where the threshold of current-driven anomalous resistivity is assumed to increase with the thermal velocity. If the initial threshold VC0 is sufficiently large in a low-β plasma, the fast reconnection mechanism can fully be set up; on the other hand, if VC0 is so small that the anomalous resistivity can easily occur in the usual circumstances, the resulting diffusion region notably lengthens so that the reconnection process becomes much less effective. Also, the fast reconnection evolution is strongly influenced by plasma β in the ambient magnetic field region, and an essential condition for the fast reconnection mechanism to evolve explosively is that the plasma β is sufficiently small. In fact, only in a low-β plasma does the magnetic tension force involved play the dominant role in the overall system dynamics and in the drastic magnetic energy release. It is also demonstrated that the ...
影响因子：
5.2
作者：
M. Hoshino;A. Nishida;T. Yamamoto;S. Kokubun
通讯作者：
M. Hoshino;A. Nishida;T. Yamamoto;S. Kokubun