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arXiv 1507.00879math.NAcs.NA
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各向异性椭圆方程渐进保持方案的数值分析

Numerical analysis of an asymptotic-preserving scheme for anisotropic elliptic equations

Université de Franche-Comté(弗朗什-孔泰大学);Université de Toulouse(图卢兹大学)

Alexei Lozinski, Jacek Narski, Claudia Negulescu

AI总结:

本文研究了针对刚性(高度各向异性)椭圆问题的稳健方法,通过证明ε无关的收敛性结果,增强了渐进保持方法的严谨性。

摘要:

本文的主要目的是从数值分析的角度研究一些旨在处理刚性(高度各向异性)椭圆问题的稳健方法。本文研究的所谓渐进保持方案在处理广泛范围的ε值(0 < ε ≪ 1)时非常高效,其中ε是刚性参数,负责问题的高各向异性。特别是,这些方案即使在ε趋近于零时,也能捕捉系统的宏观特性,而离散化参数保持不变。本文的目标是证明这些数值方案的ε无关收敛性结果,从而在构建此类AP方法时更加严谨。

英文摘要:

The main purpose of the present paper is to study from a numerical analysis point of view some robust methods designed to cope with stiff (highly anisotropic) elliptic problems. The so-called asymptotic-preserving schemes studied in this paper are very efficient in dealing with a wide range of $\varepsilon$-values, where $0 < \varepsilon \ll 1$ is the stiffness parameter, responsible for the high anisotropy of the problem. In particular, these schemes are even able to capture the macroscopic properties of the system, as $\varepsilon$ tends towards zero, while the discretization parameters remain fixed. The objective of this work shall be to prove some $\varepsilon$-independent convergence results for these numerical schemes and put hence some more rigor in the construction of such AP-methods.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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