Asymptotic expansion analysis of nonconforming mixed finite element methods for time-dependent Maxwell's equations in Debye Medium

Asymptotic expansion analysis of nonconforming mixed finite element methods for time-dependent Maxwell's equations in Debye Medium
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德拜介质中含时麦克斯韦方程非相容混合有限元方法的渐近展开分析

DOI:
10.1016/j.amc.2013.12.016
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发表时间:
2014-02
影响因子:
4
通讯作者:
Jia, Shanghui
Jia, Shanghui
中科院分区:
数学2区
文献类型:
--
作者:
Yao, Changhui;Jia, Shanghui

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本文在前人渐近展开工作的基础上,给出了半离散混合有限元格式在德拜介质中的时间域Maxwell方程整体超收敛分析的初步结果。在此过程中,首次对光滑解和混合有限元解的插值法进行了超封闭分析。通过后处理算子,可以发现超收敛现象。据我们所知,这是第一次用非协调混合有限元方法分析德拜介质时的整体超收敛问题。
In this paper, based on our previous work of asymptotic expansion, an initial effort of global superconvergence analysis of time-domain Maxwell’s equations in Debye Medium is obtained for semi-discrete mixed finite element scheme. During this procedure, superclose analysis of the interpolation of the smoothing solution and the solution of mixed finite element method is obtained for the fist time. By the post-processing operators, superconvergence phenomena can be found. To our best knowledge, this is the first global superconvergence analysis presented by nonconforming mixed finite element methods when Debye Medium is involved.
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