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arXiv 2004.12483math.NAcs.NA
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弱Galerkin有限元的数值研究

Numerical investigation on weak Galerkin finite elements

Xiu Ye, Shangyou Zhang

摘要:

弱Galerkin(WG)有限元法是求解偏微分方程的一种有效而灵活的通用数值方法。弱伽辽金有限元法的新思想是利用定义为分布的弱函数及其弱导数。弱函数和弱导数可以用不同次数的多项式逼近。不同的多项式空间组合产生不同的弱伽辽金有限元。本文的目的是通过31个数值试验,研究不同WG元的稳定性、收敛性和超逼近性。这些表格有两个目的。首先,它提供了不同WG元素的性能的详细指南。其次,表格中的信息开辟了新的研究领域,为什么一些WG元素优于其他元素。

英文摘要:

The weak Galerkin (WG) finite element method is an effective and flexible general numerical technique for solving partial differential equations. The novel idea of weak Galerkin finite element methods is on the use of weak functions and their weak derivatives defined as distributions. Weak functions and weak derivatives can be approximated by polynomials with various degrees. Different combination of polynomial spaces generates different weak Galerkin finite elements. The purpose of this paper is to study stability, convergence and supercloseness of different WG elements by providing many numerical experiments recorded in 31 tables. These tables serve two purposes. First it provides a detail guide of the performance of different WG elements. Second, the information in the tables opens new research territory why some WG elements outperform others.

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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