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arXiv 1302.2707math.NAcs.NA
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斯托克斯方程的弱伽辽金有限元方法

A Weak Galerkin Finite Element Method for the Stokes Equations

National Science Foundation(国家科学基金会);University of Arkansas at Little Rock(阿肯色大学小石城分校)

Junping Wang, Xiu Ye

AI总结:

针对原始速度-压力形式的斯托克斯方程,提出一种使用不连续多项式的弱伽辽金有限元方法,并建立了最优阶误差估计。

摘要:

本文介绍了一种用于原始速度-压力形式的斯托克斯方程的弱伽辽金(WG)有限元方法。该WG方法配备了稳定的有限元,速度采用次数$k\ge 1$的通常多项式,压力采用次数$k-1$的多项式,两者都是不连续的。速度元通过在有限元分界面上的次数$k-1$的多项式增强。所有有限元函数都是不连续的,通常的梯度和散度算子作为分布在适当定义的空间中实现。建立了相应数值近似在各种范数下的最优阶误差估计。必须强调的是,WG有限元方法是在由任意形状的多边形或多面体组成的形状正则的有限元剖分上设计的。

英文摘要:

This paper introduces a weak Galerkin (WG) finite element method for the Stokes equations in the primary velocity-pressure formulation. This WG method is equipped with stable finite elements consisting of usual polynomials of degree $k\ge 1$ for the velocity and polynomials of degree $k-1$ for the pressure, both are discontinuous. The velocity element is enhanced by polynomials of degree $k-1$ on the interface of the finite element partition. All the finite element functions are discontinuous for which the usual gradient and divergence operators are implemented as distributions in properly-defined spaces. Optimal-order error estimates are established for the corresponding numerical approximation in various norms. It must be emphasized that the WG finite element method is designed on finite element partitions consisting of arbitrary shape of polygons or polyhedra which are shape regular.

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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