二维弱随机B-域中的重联
Reconnection in weakly stochastic B-fields in 2D
摘要：
本文研究了在气压控制极限下可压缩流体中的二维湍流磁重联。我们使用开放的边界条件，并开始从哈里斯电流片配置与均匀的总压。一个小的扰动的矢量势启动层流重联的Sweet-Parker率，这是允许发展几个动力学时间。随后，亚阿尔文湍流是通过随机强迫在小波数。电流片附近的磁场拓扑结构受到湍流的强烈影响。然而，我们发现，由此产生的重联速度取决于电阻率。与以前的三维结果相反，我们没有发现快速重连的证据。重联速度表现出很大的变化，但时间平均值随湍流强度的增加而平稳增加。
英文摘要：
We study two dimensional turbulent magnetic reconnection in a compressible fluid in the gas pressure dominated limit. We use open boundary conditions and start from a Harris current sheet configuration with a uniform total pressure. A small perturbation to the vector potential initiates laminar reconnection at the Sweet-Parker rate, which is allowed to evolve for several dynamical times. Subsequently sub-Alfvenic turbulence is produced through random forcing at small wave numbers. The magnetic field topology near the current sheet is strongly affected by the turbulence. However, we find that the resulting reconnection speed depends on the resistivity. In contrast to previous results in three dimensions, we find no evidence for fast reconnection. The reconnection speed exhibits large variations but the time averages increase smoothly with the strength of the turbulence.
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