A Coupling of Local Discontinuous Galerkin and Natural Boundary Element Method for Exterior Problems

A Coupling of Local Discontinuous Galerkin and Natural Boundary Element Method for Exterior Problems
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局部间断伽辽金与自然边界元法求解外部问题的耦合

DOI:
10.1007/s10915-012-9584-9
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发表时间:
2012-12
影响因子:
2.5
通讯作者:
Yu Dehao
Yu Dehao
中科院分区:
数学2区
文献类型:
--
作者:
Huang Hongying;Yang Ju'e;Yu Dehao

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本文将局部不连续伽辽金法(LDG)与自然边界元法(NBEM)的耦合应用于二维外部问题的求解。因此,保持了LDG和NBEM的主要特征,因此耦合方法受益于两种方法的优点。参考Gatica等人。计算与应用。79(1):1369-1394,2010),我们使用函数在耦合边界上连续的LDG子空间。这样,原始变量成为唯一的边界未知,从而减少了未知函数的总数。我们证明了新离散格式的稳定性,并推导了能量范数的先验误差估计。给出了符合理论结果的数值算例。
In this paper, we apply the coupling of local discontinuous Galerkin (LDG) and natural boundary element method(NBEM) to solve a two-dimensional exterior problem. As a consequence, the main features of LDG and NBEM are maintained and hence the coupled approach benefits from the advantages of both methods. Referring to Gatica et al. (Math. Comput. 79(271):1369–1394, 2010), we employ LDG subspaces whose functions are continuous on the coupling boundary. In this way, the primitive variables become the only boundary unknown, and hence the total number of unknown functions is reduced. We prove the stability of the new discrete scheme and derive an a priori error estimate in the energy norm. Some numerical examples conforming the theoretical results are provided.
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发表时间: 1982-01-01
影响因子: 2.9
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发表时间: 2001
期刊: SIAM J. Numer. Anal.
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