Out-of-plane shear flow effects on fast magnetic reconnection in a two-dimensional hybrid simulation model  

作　　者：王琳 王先驱 王晓钢 刘悦 

机构地区：[1]MOE Key Laboratory of Materials Modification by Beams and School of Physics & Optoelectronic Technology,Dalian University of Technology [2]School of Information Science & Engineering,Dalian Polytechnic University [3]State Key Laboratory of Nuclear Physics & Technology and School of Physics,Peking University

出　　处：《Chinese Physics B》2014年第2期345-352,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos.10935004,1126114032,10778613,10575018,40731056,10975012,and 11261140326)

摘　　要：The effects of out-of-plane shear flows on fast magnetic reconnection are numerically investigated by a two- dimensional （2D） hybrid model in an initial Harris sheet equilibrium with flows. The equilibrium and driven shear flows out of the 2D reconnection plane with symmetric and antisymmetric profiles respectively are used in the simulation. It is found that the out-of-plane flows with shears in-plane can change the quadrupolar structure of the out-of-plane magnetic field and, therefore, modify the growth rate of magnetic reconnection. Furthermore, the driven flow varying along the anti-parallel magnetic field can either enhance or reduce the reconnection rate as the direction of flow changes. Secondary islands are also generated in the process with converting the initial X-point into an O-point.The effects of out-of-plane shear flows on fast magnetic reconnection are numerically investigated by a two- dimensional （2D） hybrid model in an initial Harris sheet equilibrium with flows. The equilibrium and driven shear flows out of the 2D reconnection plane with symmetric and antisymmetric profiles respectively are used in the simulation. It is found that the out-of-plane flows with shears in-plane can change the quadrupolar structure of the out-of-plane magnetic field and, therefore, modify the growth rate of magnetic reconnection. Furthermore, the driven flow varying along the anti-parallel magnetic field can either enhance or reduce the reconnection rate as the direction of flow changes. Secondary islands are also generated in the process with converting the initial X-point into an O-point.

关 键 词：out-of-plane magnetic field shear flow magnetic reconnection Hall effects 

分 类 号：O53[理学—等离子体物理]