中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
较小尺度磁螺旋线管相互作用的数值研究

文献类型:期刊论文

作者叶占银
刊名空间科学学报
出版日期2008
卷号28期号:3页码:194-202
关键词太阳风 日冕物质抛射 MHD方程组
ISSN号0254-6124
其他题名Numerical Research About Interaction Between Two Tube Models Containing Spiral Magnetic Field Lines With a Little Small Length-Scale
通讯作者北京8701信箱
中文摘要在子午面内,偶极子场和六极子场适当叠加得到势磁场,势磁场与太阳风长时间相互作用得到特殊的冕流背景结构.在这种背景结构下,两个较小尺度的磁螺旋线管模型能够连续浮入到计算域,在计算域内相互作用,触发了日冕物质抛射(CME).在数值模拟这一过程时,较小尺度的磁螺旋线管模型具有同心厕形磁场结构,模型中心等离子压强与边界压强之比m=2,模型的半径分别取为a=0.07Rs和a=0.1Rs(Rs为太阳半径).在这两种情况下,得到了两种典型的计算结果.当a=0.07Rs时,两个磁螺旋线管模型相互作用,在7Rs内融合成一个磁螺旋线管模型,向外传播;当a=0.1Rs时,两个磁螺旋线管模型相瓦作用,作为一个整体向外传播,在计算域内没有融合到一起,基本上保持各自的磁场结构.
英文摘要After a long time interaction, governed by the magneto by drodynamic (MHD) equations,between the Parker solar wind flow and a potential magnetic field combined by a dipole and a hexapole,a special streamer background structure in the solar meridian plane is presented.With the background structure,two tube models containing spiral magnetic field lines with a small length-scale can move in the computational domain step by step, interact afterward and trigger a Coronal Mass Ejection (CME) finally.The tube model is approached by a structure made up of two-dimensional co-circular magnetic field lines, with a ratio of the plasma pressure at its.center to that at its edge m=2 and with a radius a for two cases:a=0.07 RS (Rs is the solar radius) and a=0.1 RS respectively. Corresponding to the two cases,two typical numerical results are obtained.In the case a=0.07 Rg,the two tube models interact with each other, merge into one set of co-circular magnetic field lines in seven solar radii and propagate outward.In the other case a=0.1 Re,the two tube models do not merge into one and keep two sets of co-circular magnetic field lines exist in the computational domain during their propagation as a whole.
学科主题空间物理
收录类别CSCD
语种中文
CSCD记录号CSCD:3271397
源URL[http://ir.cssar.ac.cn/handle/122/1386]  
专题国家空间科学中心_空间科学部
推荐引用方式
GB/T 7714
叶占银. 较小尺度磁螺旋线管相互作用的数值研究[J]. 空间科学学报,2008,28(3):194-202.
APA 叶占银.(2008).较小尺度磁螺旋线管相互作用的数值研究.空间科学学报,28(3),194-202.
MLA 叶占银."较小尺度磁螺旋线管相互作用的数值研究".空间科学学报 28.3(2008):194-202.

入库方式: OAI收割

来源:国家空间科学中心

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