A fully magnetohydrodynamic simulation of three-dimensional non-null reconnection
A fully magnetohydrodynamic simulation of three-dimensional non-null reconnection
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DOI：
10.1063/1.1891005
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发表时间：
2005-04
影响因子：
2.2
通讯作者：
D. Pontin;K. Galsgaard;G. Hornig;E. Priest
中科院分区：
文献类型：
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作者：
D. Pontin;K. Galsgaard;G. Hornig;E. Priest
了解全三维磁场重联的性质对于理解等离子体中的许多过程至关重要。以前已经表明，在运动学制度的磁通量在三维重联的演变是非常不同的二维。本文描述了一个完全磁流体动力学数值模拟，其中这种演变进行了研究。重联发生在没有磁零点的情况下，并且非理想区域局限于磁畴的中心。不同规定的折射率的影响被认为是。磁场受到剪切边界运动的应力，并且电流集中在体积内增长。一个滞流点的发展，与强大的流出射流从重联区发出。磁通量的行为与运动学机制中发现的密切匹配。特别是，它被发现，没有唯一的磁力线速度存在，并作为一个结果场李…
A knowledge of the nature of fully three-dimensional magnetic reconnection is crucial in understanding a great many processes in plasmas. It has been previously shown that in the kinematic regime the evolution of magnetic flux in three-dimensional reconnection is very different from two dimensions. In this paper a numerical fully magnetohydrodynamic simulation is described, in which this evolution is investigated. The reconnection takes place in the absence of a magnetic null point, and the nonideal region is localized in the center of the domain. The effect of differently prescribed resistivities is considered. The magnetic field is stressed by shear boundary motions, and a current concentration grows within the volume. A stagnation-point flow develops, with strong outflow jets emanating from the reconnection region. The behavior of the magnetic flux matches closely that discovered in the kinematic regime. In particular, it is found that no unique field line velocity exists, and that as a result field li...