Convergence of adaptive BEM for some mixed boundary value problem

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• 作者：M. Aurada ^{Markus.Aurada@tuwien.ac.at} ; S. Ferraz-Leite ^{Samuel.Ferraz-Leite@tuwien.ac.at} ; P. Goldenits ^{Petra.Goldenits@tuwien.ac.at} ; M. Karkulik ; ^{Michael.Karkulik@tuwien.ac.at} ; ; M. Mayr ^{Markus.Mayr@tuwien.ac.at} ; D. Praetorius ^{Dirk.Praetorius@tuwien.ac.at}
• 关键词：Boundary element method ; Local mesh-refinement ; Adaptive algorithm ; Convergence
• 刊名：Applied Numerical Mathematics
• 出版年：2012
• 期刊代码：8_01689274
• 类别：cp
• 出版时间：April, 2012
• 卷：62
• 期：4
• 页码：226-245
• 文件大小：431 K

摘要

For a boundary integral formulation of the 2D Laplace equation with mixed boundary conditions, we consider an adaptive Galerkin BEM based on an -type error estimator. We include the resolution of the Dirichlet, Neumann, and volume data into the adaptive algorithm. In particular, an implementation of the developed algorithm has only to deal with discrete integral operators. We prove that the proposed adaptive scheme leads to a sequence of discrete solutions, for which the corresponding error estimators tend to zero. Under a saturation assumption for the non-perturbed problem which is observed empirically, the sequence of discrete solutions thus converges to the exact solution in the energy norm.