NSSC OpenIR  > 空间科学部
地球弓激波的三维模拟
Alternative TitleSimulation of Three-dimensional Earth's Bow Shock
胡慧萍; 吕建永; 周全; 王明; 杨亚芬; 刘子谦; 裴世鑫
Department空间科学部
Source Publication空间科学学报
2015
Volume35Issue:1Pages:1-8
ISSN0254-6124
Language中文
Keyword弓激波 太阳风 快磁声马赫数 磁层顶曲率半径
Abstract利用磁流体动力学(MHD)全球模拟结果,根据弓激波的跃变特性确定出弓激波位置,建立了一个新的综合考虑了快磁声马赫数、太阳风动压、行星际磁场强度以及磁层顶曲率半径的弓激波三维位型模型.将新模型与以往模型的模拟结果进行比较发现,新的弓激波全球模型结果可靠,解决了部分现有模型不能描述弓激波三维位型的问题.研究结果表明,在行星际磁场北向时,随着快磁声马赫数的增大,弓激波日下点距离减小,但是在行星际磁场南向时,快磁声马赫数的变化对弓激波日下点距离影响不大;弓激波位型在赤道面与子午面上存在明显的不对称性,而且随着行星际磁场的转向,这种非对称性也会发生相应改变;行星际磁场南向,B_z值较小时,子午面内弓激波位型已经不是简单的抛物线,出现了明显的类似于极尖区磁层顶的凹陷变化区.
Other AbstractWe use a physics-based global Magnetohydrodynamic (MHD) model to investigate the location and shape of the Earth's bow shock. The bow shock locations in the simulations are identified by an automated search algorithm and is fitted by simple analytical functions. A global three dimensional bow shock model is constructed to include the effect of magnetopause and is parameterized by the fast magnetosonic Mach number, solar wind ram pressure, interplanetary magnetic field strength, and magnetopause curvature radius. The model results are compared and agree well with the previous empirical and simulation models. We also find that both the shock standoff distance and the shock flaring angle decrease monotonically with increasing the fast magnetosonic Mach number. The size and location of bow shock on the equatorial plane and the meridian plane show obvious asymmetry.
Indexed ByCSCD
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4682
Collection空间科学部
Recommended Citation
GB/T 7714
胡慧萍,吕建永,周全,等. 地球弓激波的三维模拟[J]. 空间科学学报,2015,35(1):1-8.
APA 胡慧萍.,吕建永.,周全.,王明.,杨亚芬.,...&裴世鑫.(2015).地球弓激波的三维模拟.空间科学学报,35(1),1-8.
MLA 胡慧萍,et al."地球弓激波的三维模拟".空间科学学报 35.1(2015):1-8.
Files in This Item: Download All
File Name/Size DocType Version Access License
20153511.pdf(2275KB) 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[胡慧萍]'s Articles
[吕建永]'s Articles
[周全]'s Articles
Baidu academic
Similar articles in Baidu academic
[胡慧萍]'s Articles
[吕建永]'s Articles
[周全]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[胡慧萍]'s Articles
[吕建永]'s Articles
[周全]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 20153511.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.