Computer studies on the fast reconnection mechanism under an externally driven boundary condition
Computer studies on the fast reconnection mechanism under an externally driven boundary condition
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外部驱动边界条件下快速重连机制的计算机研究
DOI：
10.1063/1.870524
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发表时间：
1994
影响因子：
2.2
通讯作者：
M. Ugai
中科院分区：
文献类型：
--
作者：
M. Ugai
计算机模拟研究了在流入边界上施加连续局部等离子体注入的电流片系统中磁场重联的时间动力学。基本重联过程的电阻率模型的强烈影响。对于一个均匀的电阻率模型，场线变得平坦，随着时间的推移，使所得到的准稳态配置涉及一个长的扩散区和重连率强烈依赖于电阻率，在良好的协议与斯威特帕克机制。对于异常电阻率模型，磁重联急剧发生，导致大规模等离子体团的发展。一旦有效电阻率被触发，准稳态快速重联机制自发发展，即使在没有指定的边界条件，在良好的协议与自发快速重联模型。当外加等离子体注入大于自发快速重联机制所固有的注入时，快速重联机制将被破坏。
Computer simulations study the temporal dynamics of magnetic reconnection in a current sheet system under a continuous local plasma injection imposed on the inflow boundary. The basic reconnection process is strongly influenced by the resistivity model. For a uniform resistivity model, the field lines become flattened with time so that the resulting quasisteady configuration involves a long diffusion region and the reconnection rate strongly depends on the resistivity, in good agreement with the Sweet–Parker mechanism. For an anomalous resistivity model, magnetic reconnection drastically occurs, leading to development of a large‐scale plasmoid. Once an effective resistivity is triggered, a quasisteady fast reconnection mechanism spontaneously develops even in the absence of the specified boundary condition, in good agreement with the spontaneous fast reconnection model. When the imposed plasma injection is larger than the one inherent to the spontaneous fast reconnection mechanism, the fast reconnection m...
影响因子：
4.6
作者：
D. Biskamp
通讯作者：
D. Biskamp