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arXiv 1509.08641math.NAcs.NA
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具有边界连续性的弱伽辽金有限元方案用于二阶椭圆问题

A weak Galerkin finite element scheme with boundary continuity for second-order elliptic problems

Jilin University(吉林大学);University of Arkansas at Little Rock(阿肯色大学小石城分校)

Qilong Zhai, Xiu Ye, Ruishu Wang, Ran Zhang

AI总结:

本文提出一种新的弱伽辽金有限元方法,用于在多边形网格上求解二阶椭圆问题,通过使用具有边界连续性的多项式进行分析,建立了最优阶误差估计,并通过数值实验验证了方法的鲁棒性、可靠性和准确性。

摘要:

本文介绍了一种新的弱伽辽金(WG)有限元方法,用于在多边形网格上求解二阶椭圆问题,通过使用具有边界连续性的多项式进行分析。WG方法利用弱函数及其弱导数,这些可以由不同多项式空间的组合近似。不同的组合产生不同的弱伽辽金有限元方法,这使WG方法在实际计算中具有高度的灵活性和效率。本文探讨了某种多项式空间的组合,以最小化数值方案的自由度,同时不损失数值近似的准确性。建立了对应WG近似的最优阶误差估计,包括离散H¹范数和标准L²范数。此外,本文还通过一些数值实验展示了WG方法的威力。数值结果显示了WG方法在鲁棒性、可靠性和准确性方面的巨大潜力。

英文摘要:

A new weak Galerkin (WG) finite element method for solving the second-order elliptic problems on polygonal meshes by using polynomials of boundary continuity is introduced and analyzed. The WG method is utilizing weak functions and their weak derivatives which can be approximated by polynomials in different combination of polynomial spaces. Different combination gives rise to different weak Galerkin finite element methods, which makes WG methods highly flexible and efficient in practical computation. This paper explores the possibility of certain combination of polynomial spaces that minimize the degree of freedom in the numerical scheme, yet without losing the accuracy of the numerical approximation. Error estimates of optimal order are established for the corresponding WG approximations in both a discrete $H^1$ norm and the standard $L^2$ norm. In addition, the paper also presents some numerical experiments to demonstrate the power of the WG method. The numerical results show a great promise of the robustness, reliability, flexibility and accuracy of the WG method.

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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