arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.3655math.NAcs.NA
收藏

二阶椭圆问题的弱Galerkin混合有限元方法

A Weak Galerkin Mixed Finite Element Method for Second-Order Elliptic Problems

Division of Mathematical Sciences, National Science Foundation(国家科学基金会数学科学部);Department of Mathematics, University of Arkansas at Little Rock(阿肯色大学小石城分校数学系)

Junping Wang, Xiu Ye

AI总结:

针对二阶椭圆问题的一阶方程组形式,提出并分析了一种新的弱Galerkin混合有限元方法(WG-MFEM),采用任意多边形/多面体上的间断分片多项式,实现了对原变量和通量变量的高精度逼近,并建立了离散H1和L2范数下的最优阶误差估计。

摘要:

针对二阶椭圆方程,将其表述为两个一阶线性方程组成的系统,提出并分析了一种新的弱Galerkin(WG)方法。该方法称为WG-MFEM,通过在任意形状多边形/多面体的有限元剖分上使用间断分片多项式进行设计。WG-MFEM能够为原变量和通量变量提供非常精确的数值逼近。允许在任意形状的多边形/多面体上使用间断逼近函数,使得该方法在实际计算中具有高度灵活性。针对相应的弱Galerkin混合有限元解,建立了离散$H^1$和$L^2$范数下的最优阶误差估计。

英文摘要:

A new weak Galerkin (WG) method is introduced and analyzed for the second order elliptic equation formulated as a system of two first order linear equations. This method, called WG-MFEM, is designed by using discontinuous piecewise polynomials on finite element partitions with arbitrary shape of polygons/polyhedra. The WG-MFEM is capable of providing very accurate numerical approximations for both the primary and flux variables. Allowing the use of discontinuous approximating functions on arbitrary shape of polygons/polyhedra makes the method highly flexible in practical computation. Optimal order error estimates in both discrete $H^1$ and $L^2$ norms are established for the corresponding weak Galerkin mixed finite element solutions.

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。

↑