Numerical simulations of the solar corona and Coronal Mass Ejections

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• 作者：Stefaan Poedts ; Carla Jacobs ; Bart van der Holst…
• 关键词：Magnetohydrodynamics ; numerical ; coronal mass ejections
• 刊名：Earth, Planets and Space
• 出版年：2009
• 出版时间：May 2009
• 年：2009
• 卷：61
• 期：5
• 页码：599-602
• 全文大小：254KB
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• 作者单位：Stefaan Poedts (113)
  Carla Jacobs (113)
  Bart van der Holst (113)
  Emmanuel Chan茅 (113)
  Rony Keppens (113)
  
  113. Centrum voor Plasma-Astrofysica, Katholieke Universiteit Leuven, Belgium
  
• 刊物类别：Earth Sciences, general; Geology; Geophysics/Geodesy;
• 刊物主题：Earth Sciences, general; Geology; Geophysics/Geodesy;
• 出版者：Springer Berlin Heidelberg
• ISSN：1880-5981

文摘

Numerical simulations of Coronal Mass Ejections (CMEs) can provide a deeper insight in the structure and propagation of these impressive solar events. In this work, we present our latest results of numerical simulations of the initial evolution of a fast CME. For this purpose, the equations of ideal MagnetoHydroDynamics (MHD) have been solved on a three-dimensional (3D) mesh by means of an explicit, finite volume solver, where the simulation domain ranges from the lower solar corona up to 30R _e. In order to simulate the propagation of a CME throughout the heliosphere, a magnetic flux rope is superposed on top of a stationary background solar (MHD) wind with extra density added to the flux rope. The flux rope is launched by giving it an extra initial velocity in order to get a fast CME forming a 3D shock wave. The magnetic field inside the initial flux rope is described in terms of Bessel functions and possesses a high amount of twist. Key words Magnetohydrodynamics numerical coronal mass ejections