Numerical Simulation of the 12 May 1997 CME Event
Numerical Simulation of the 12 May 1997 CME Event
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DOI：
10.1088/0256-307x/25/2/119
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发表时间：
2008-01
影响因子：
3.5
通讯作者：
Zhou Yu-fen;Feng Xueshang;S. Wu
中科院分区：
文献类型：
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作者：
Zhou Yu-fen;Feng Xueshang;S. Wu
本文以1997年5月12日CME事件为例，用我们新发展的CESE MHD模型模拟了日地连接事件。本文数值模型的主要特点和近似方法如下：（1）采用了球面几何中的修正守恒元和解元（CESE）数值格式。(2)利用三维时变MHD数值模型，输入实测光球磁场，得到背景太阳风。(3)通过引入热等离子体的质量流，从太阳表面获得瞬态扰动。数值模拟使我们能够预测行星际激波的到来，并为我们提供了一个比较令人满意的比较风航天器的观测。
Our newly developed CESE MHD model is used to simulate sun-earth connection event with the well-studied 12 May 1997 CME event as an example. The main features and approximations of our numerical model are as follows: (1) The modified conservation element and solution element (CESE) numerical scheme in spherical geometry is implemented in our code. (2) The background solar wind is derived from a 3D time-dependent numerical MHD model by input measured photospheric magnetic fields. (3) Transient disturbances are derived from solar surface by introducing a mass flow of hot plasma. The numerical simulation has enabled us to predict the arrival of the interplanetary shock and provided us with a relatively satisfactory comparison with the WIND spacecraft observations.