中国科学院紫金山天文台机构知识库
Advanced  
PMO OpenIR  > 暗物质和空间天文实验室  > 期刊论文
题名: Evolution of Kelvin-Helmholtz instability at Venus in the presence of the parallel magnetic field
作者: Lu, H. Y.1, 2; Cao, J. B.1; Zhang, T. L.3; Fu, H. S.1; Ge, Y. S.4
刊名: PHYSICS OF PLASMAS
出版日期: 2015-06-01
卷号: 22, 期号:6
DOI: 10.1063/1.4922753
文章类型: Article
英文摘要: Two-dimensional MHD simulations were performed to study the evolution of the Kelvin-Helmholtz (KH) instability at the Venusian ionopause in response to the strong flow shear in presence of the in-plane magnetic field parallel to the flow direction. The physical behavior of the KH instability as well as the triggering and occurrence conditions for highly rolled-up vortices are characterized through several physical parameters, including Alfven Mach number on the upper side of the layer, the density ratio, and the ratio of parallel magnetic fields between two sides of the layer. Using these parameters, the simulations show that both the high density ratio and the parallel magnetic field component across the boundary layer play a role of stabilizing the instability. In the high density ratio case, the amount of total magnetic energy in the final quasi-steady status is much more than that in the initial status, which is clearly different from the case with low density ratio. We particularly investigate the nonlinear development of the case that has a high density ratio and uniform magnetic field. Before the instability saturation, a single magnetic island is formed and evolves into two quasi-steady islands in the non-linear phase. A quasi-steady pattern eventually forms and is embedded within a uniform magnetic field and a broadened boundary layer. The estimation of loss rates of ions from Venus indicates that the stabilizing effect of the parallel magnetic field component on the KH instability becomes strong in the case of high density ratio. (C) 2015 AIP Publishing LLC.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Physics, Fluids & Plasmas
研究领域[WOS]: Physics
关键词[WOS]: SOLAR-WIND ; PLASMA ENVIRONMENT ; IONOPAUSE ; SIMULATION ; STABILITY ; MHD ; BOUNDARY ; EXPRESS ; FLOW
收录类别: SCI
语种: 英语
WOS记录号: WOS:000357689500051
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16004
Appears in Collections:暗物质和空间天文实验室_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Beihang Univ, Space Sci Inst, Sch Astronaut, Beijing 100191, Peoples R China
2.Chinese Acad Sci, Key Lab Planetary Sci, Nanjing 210008, Peoples R China
3.Austrian Acad Sci, Space Res Inst, A-8042 Graz, Austria
4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Lu, H. Y.]'s Articles
[Cao, J. B.]'s Articles
[Zhang, T. L.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Lu, H. Y.]‘s Articles
[Cao, J. B.]‘s Articles
[Zhang, T. L.]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

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

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院紫金山天文台 - Feedback
Powered by CSpace