中国物理B ›› 2014, Vol. 23 ›› Issue (2): 25203-025203.doi: 10.1088/1674-1056/23/2/025203

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

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

王琳a b, 王先驱c, 王晓钢c, 刘悦a   

  1. a MOE Key Laboratory of Materials Modification by Beams and School of Physics & Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China;
    b School of Information Science & Engineering, Dalian Polytechnic University, Dalian 116034, China;
    c State Key Laboratory of Nuclear Physics & Technology and School of Physics, Peking University, Beijing 100871, China
  • 收稿日期:2013-05-30 修回日期:2013-07-04 出版日期:2013-12-12 发布日期:2013-12-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10935004, 1126114032, 10778613, 10575018, 40731056, 10975012, and 11261140326).

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

Wang Lin (王琳)a b, Wang Xian-Qu (王先驱)c, Wang Xiao-Gang (王晓钢)c, Liu Yue (刘悦)a   

  1. a MOE Key Laboratory of Materials Modification by Beams and School of Physics & Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China;
    b School of Information Science & Engineering, Dalian Polytechnic University, Dalian 116034, China;
    c State Key Laboratory of Nuclear Physics & Technology and School of Physics, Peking University, Beijing 100871, China
  • Received:2013-05-30 Revised:2013-07-04 Online:2013-12-12 Published:2013-12-12
  • Contact: Wang Xiao-Gang E-mail:xgwang@pku.edu.cn
  • About author:52.35.Vd; 52.30.-q; 94.30.-d; 96.60.lv
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10935004, 1126114032, 10778613, 10575018, 40731056, 10975012, and 11261140326).

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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.

关键词: out-of-plane magnetic field, shear flow, magnetic reconnection, Hall effects

Abstract: 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.

Key words: out-of-plane magnetic field, shear flow, magnetic reconnection, Hall effects

中图分类号:  (Magnetic reconnection)

  • 52.35.Vd
52.30.-q (Plasma dynamics and flow) 94.30.-d (Physics of the magnetosphere)