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一种确定模拟的行星际MHD激波局地参数的新方法
Alternative TitleA NEW APPROACH TO DETERMINE LOCAL PARAMETERS OF INTERPLANETARY SIMULATED MHD SHOCKS
向长青; 王敬芳; 魏奉思; 黄为民; 熊东辉; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication空间科学学报
2002
Volume22Issue:1Pages:6-12
ISSN0254-6124
Language中文
Keyword行星际模拟mhd激波 局地参数 流体力学 日冕物质抛射事件
Abstract简要阐述了分析模拟的行星际磁流体力学(MHD)激波的局部性质时,采用无厚度局部平面激波这一假设的合理性,说明了在激波未扰动区域(激波上游),物理量在几个小时内的变化很小这一事实,利用平面激波的分析方法,提出了分析模拟的行星际MHD激波的新方法,包括激波位置的确定,上下游状态参数的选择,激波局部参数的计算以及激波的分类,最后应用这种方法对一个二维的MHD模拟结果进行了分析.结果证实了过去文献关于磁流体力学混合激波空间连接和时间演化的链式规则,而且说明位于太阳赤道附近的慢激波和中间激波最终会发展为快激波.
Other AbstractFirstly, it is accounted for the validity of the hypothesis that interplanetary MHD shocks can be treated as locally planar with no thickness when analyzing their local properties, and the fact is demonstrated that the variations of the phys-ical quantities can be ignored in the area where no shock perturbs (in the upper reach of the shock) within a few hours. Then making use of the method to analyze planar MHD shocks. In doing so, a new approach is developed to determine local parameters of interplanetary simulated MHD shocks. The proposed approach in-cludes defining the location of the shock, selecting the state parameters in the upper and lower reaches of the shock, computing the shock's local parameters, and classi-ing the shock according to its upstream and downstream Alfvevn Mach numbers.Finally, the proposed method is used to deal with the result of a two-dimensional MHD simulation. The analyses confirm the linkage law of hybrid MHD shocks'spatial connection aad temporal evolution in the past refer}nee a$cl reveal tkat the slow and intermediate shocks near the solar equator finally evolve into fast shocks during their outward propagation.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.nssc.ac.cn/handle/122/1454
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
向长青,王敬芳,魏奉思,等. 一种确定模拟的行星际MHD激波局地参数的新方法[J]. 空间科学学报,2002,22(1):6-12.
APA 向长青,王敬芳,魏奉思,黄为民,熊东辉,&北京8701信箱.(2002).一种确定模拟的行星际MHD激波局地参数的新方法.空间科学学报,22(1),6-12.
MLA 向长青,et al."一种确定模拟的行星际MHD激波局地参数的新方法".空间科学学报 22.1(2002):6-12.
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