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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)
Department空间科学部
Source PublicationScience China Technological Sciences
2018
Volume61Issue:9Pages:1364-1371
ISSN1674-7321
Language英语
KeywordEarth’s Magnetotail Current Sheet Flapping Magnetohydrodynamic Numerical Simulation
Abstract

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.

Indexed BySCI ; EI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/6423
Collection空间科学部
Corresponding AuthorDuan, AiYing (duanaiying@ucas.ac.cn)
Recommended Citation
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,2018,61(9):1364-1371.
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,61(9),1364-1371.
MLA Duan, AiYing,et al."3D MHD simulation of the double-gradient instability of the magnetotail current sheet".Science China Technological Sciences 61.9(2018):1364-1371.
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