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3D MHD simulation of the double-gradient instability of the magnetotail current sheet
Duan, AiYing; Zhang, Huai; Lu, HaoYu; Duan, AiYing (duanaiying@ucas.ac.cn)
作者部门空间科学部
发表期刊Science China Technological Sciences
2018
ISSN1674-7321
语种英语
关键词Earth’s Magnetotail Current Sheet Flapping Magnetohydrodynamic Numerical Simulation
摘要Flapping motion of the current sheet (CS) is an important physical process in the Earth’s magnetotail. The magnetic double- gradient model, which includes both the instability and wave modes, offers a reasonable explanation for the exciting and propagation of the flapping wave. In this paper, we apply an advanced numerical magnetohydrodynamic (MHD) scheme (conservation element and solution element (CESE)-MHD) to simulate the magnetic double-gradient instability in an idealized current sheet that mimics the magnetotail configuration. We initialize the simulations with a numerically relaxed magnetotail equilibrium, in which the normal component of the magnetic field has a tailward gradient. It is confirmed in our simulation that the instability develops in the current layer. The growth rate of the instability yielded from the simulation is very close to the prediction of theory, with a relative deviation of only ten percent. The results demonstrate that the CESE-MHD scheme is very powerful in numerical study of the double-gradient mechanism of the CS flapping mode, and can be used for further investigations of the flapping motion in more realistic CS configurations. © 2018, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
收录类别EI
文献类型期刊论文
条目标识符http://ir.nssc.ac.cn/handle/122/6423
专题空间科学部
通讯作者Duan, AiYing (duanaiying@ucas.ac.cn)
推荐引用方式
GB/T 7714
Duan, AiYing,Zhang, Huai,Lu, HaoYu,et al. 3D MHD simulation of the double-gradient instability of the magnetotail current sheet[J]. Science China Technological Sciences,2018.
APA Duan, AiYing,Zhang, Huai,Lu, HaoYu,&Duan, AiYing .(2018).3D MHD simulation of the double-gradient instability of the magnetotail current sheet.Science China Technological Sciences.
MLA Duan, AiYing,et al."3D MHD simulation of the double-gradient instability of the magnetotail current sheet".Science China Technological Sciences (2018).
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