Difference Between the Ion Gyroviscous Effect and Hall Magnetohydrodynamic Effect in the Magnetic Reconnection  

作　　者：CAI Chun-lin ZHOU Guo-cheng CAO Jin-bin WANG De-ju 蔡春林;周国成;曹晋滨;王德驹(Center for Space Science and Applied Research,Chinese Academy of Sciences,Beijing 100080)

机构地区：[1]Center for Space Science and Applied Research,Chinese Academy of Sciences,Beijing 100080

出　　处：《Chinese Physics Letters》1999年第11期856-858,共3页中国物理快报（英文版）

基　　金：the National Natural Science Foundation of China under Grant No.49774247.

摘　　要：We study the ion gyroviscous effect and Hall magnetohydrodynamic (MHD) effect separately using the modified MHD simulation of the magnetopause. Simulations show that the ion gyroviscous effect is on the order of a characteristic scale of ion Larmor radius and is mainly limited near the magnetosheath boundary. The Hall MHD effect is on the order of a characteristic scale of ion inertial length and occurs mainly in the central region of the current layer. The magnetic field component out of the simulation plane has a bipolar structure near the magnetosheath boundary from the ion gyroviscous effect and a quadrupole structure in the central region of the current layer from the Hall MHD effect. These results are of fundamental importance in understanding the reconnection processes in space and astrophysical plasma.

关 键 词：VISCOUS EFFECT effect. 

分 类 号：F42[经济管理—产业经济]