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首页> 外文期刊>Journal of Computational Physics >FINITE ELEMENT NUMERICAL MODELING OF STATIONARY TWO-DIMENSIONAL MAGNETOSPHERE WITH DEFINED BOUNDARY
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FINITE ELEMENT NUMERICAL MODELING OF STATIONARY TWO-DIMENSIONAL MAGNETOSPHERE WITH DEFINED BOUNDARY

机译：定界二维平稳电磁球的有限元数值模拟

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A finite element numerical procedure is developed for two-dimensional modeling of stationary magnetosphere. The whole magnetic field is supposed to be a sum of given internal fields and a searched divergent-free and curl-free field of the magnetopause shielding current system, The boundary condition on the given boundary is the Neumann one on the magnetopause part of the computational region boundary and the Dirichlet condition on the segment part, closing this region at the tail. The algorithms used for automatic grid generation and grid transformation allow wide flexibility in determining the region shape and the assigned internal fields. Some numerical implementations not only demonstrate the method capabilities. In the frame of the two-dimensional approach these implementations could be considered as a tentative simulation of some typical features of magnetosphere magnetic field topology, which is intrinsically three-dimensional. The magnetopause geometry influence on the cusp inclination is shown. The impact of the northward and the flow-aligned field on dayside merging and tail asymmetry is aluminized. A two-dimensional approach to modelling the crosstail currents is proposed for the Earth-type and Uranus-type magnetospheres. (C) 1995 Academic Press, Inc. [References: 19]
机译：开发了用于静态磁层二维建模的有限元数值程序。整个磁场应该是给定内部磁场与磁致绝经屏蔽电流系统的搜索散度和无卷曲场之和，给定边界的边界条件是计算的磁致绝经部分的诺伊曼边界。区域边界和分段部分上的Dirichlet条件，在尾部封闭该区域。用于自动网格生成和网格转换的算法为确定区域形状和分配的内部场提供了很大的灵活性。一些数值实现不仅证明了方法的功能。在二维方法的框架内，这些实现方式可以看作是磁层磁场拓扑的某些典型特征的初步模拟，而固有特征是三维的。示出了磁石顶几何形状对尖顶倾斜度的影响。镀铝向北流向流动对日合并和尾部不对称的影响。提出了一种对地球和天王星型磁层的交叉尾电流建模的二维方法。 （C）1995 Academic Press，Inc. [参考：19]

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