A weak Galerkin finite element scheme for solving the stationary Stokes equations

A weak Galerkin finite element scheme for solving the stationary Stokes equations
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求解平稳斯托克斯方程的弱伽辽金有限元格式

DOI:
10.1016/j.cam.2016.01.025
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发表时间:
2016-01
影响因子:
2.4
通讯作者:
Zhang, Ran
Zhang, Ran
中科院分区:
数学2区
文献类型:
--
作者:
Wang, Ruishu;Wang, Xiaoshen;Zhai, Qilong;Zhang, Ran

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利用间断分段多项式,建立了求解二维或三维定常Stokes方程的弱Galerkin(WG)有限元方法。我们考虑的变分形式是基于两个梯度算子,这是不同于通常的梯度发散算子。WG方法是高度灵活的,允许使用不连续函数的任意多边形或多面体具有一定的形状规则性。最优阶误差估计建立相应的WG有限元解在各种规范。数值结果说明了新的WG有限元格式的Stokes问题的理论分析。
A weak Galerkin (WG) finite element method for solving the stationary Stokes equations in two- or three- dimensional spaces by using discontinuous piecewise polynomials is developed and analyzed. The variational form we considered is based on two gradient operators which is different from the usual gradient-divergence operators. The WG method is highly flexible by allowing the use of discontinuous functions on arbitrary polygons or polyhedra with certain shape regularity. Optimal-order error estimates are established for the corresponding WG finite element solutions in various norms. Numerical results are presented to illustrate the theoretical analysis of the new WG finite element scheme for Stokes problems.
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影响因子: 2.5
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