EFFECTS OF PRESSURE ANISOTROPY OF SPACE PLASMA ON MAGNETIC RECONNECTION
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摘要: 基于二维时变可压缩磁流体动力学模拟,数值研究了等离子体压力各向异性对磁场重联的影响,发现一个小的压力各向异性(P⊥=1.02P//)即可大大加速磁场重联的发展,这可能是由于磁镜不稳定性与撕裂模不稳定性共同起作用.在P⊥P//的情况下,撕裂模受到抑制,电流片中不能形成大型磁岛.Abstract: The effects of pressure anisotropy on the magnetic reconnection of plasma arestudied based on two-dimensional compressible MHD numerical simulation. It isfound that the growth rate of magnetic reconnection is greatly enhanced in thepresence of a small pressure anistropy (P⊥=1.02P//). This suggests thatmirror instability and tearing instability both affect the developmentof magnetic reconnection. In a pressure anisotropy with (P⊥=1.02P//) tearing mode is restricted and can't form large magneticislands.
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Key words:
- Pressure anisotropy /
- Magnetic reconnection /
- Numerical simulation
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