The CG1-DG2 method for convection-diffusion equations in 2D

The CG1-DG2 method for convection-diffusion equations in 2D
复制标题

二维对流扩散方程的 CG1-DG2 方法

DOI:
10.1016/j.cam.2014.03.008
复制
发表时间:
2014
期刊:
J. Comput. Appl. Math.
影响因子:
--
通讯作者:
R. Becker
R. Becker
中科院分区:
--
文献类型:
--
作者:
M. Bittl;D. Kuzmin;R. Becker

文献摘要

参考文献

被引文献

相似文献

本文提出了求解对流扩散方程的CG1-DG2方法。连续的分段线性函数空间被不连续的二次曲面所丰富,使得所得到的有限元逼近在网格的顶点是连续的,但可能有跨越边的跳跃。考虑了三种不同的离散扩散部分的方法:对称内罚Galerkin法、非对称内罚Galerkin法和Baumann-Oden法。在椭圆问题的背景下,我们总结了众所周知的不连续Galerkin逼近的先验误差估计,这些估计延续到了CG1-DG2方法。对扩散问题和对流扩散问题的数值研究也证实了这两种方法具有相同的收敛速度。
In this paper, we present the CG1–DG2 method for convection–diffusion equations. The space of continuous piecewise-linear functions is enriched with discontinuous quadratics so that the resultant finite element approximation is continuous at the vertices of the mesh but may have jumps across the edges. Three different approaches to the discretization of the diffusive part are considered: the symmetric interior penalty Galerkin method, the non-symmetric interior penalty Galerkin method and the Baumann–Oden method. In the context of elliptic problems we summarize well-known a priori error estimates for the discontinuous Galerkin approximation which carry over to the CG1–DG2 approach. Both methods have the same convergence rate which is also confirmed by numerical studies for diffusion and convection–diffusion problems.
非线性非平稳对流扩散问题的不连续伽辽金近似的最优 L∞(L2) 误差估计
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
V. Dolejší;M. Feistauer;V. Kučera;V. Sobotíková
通讯作者: V. Sobotíková
DOI: 10.1137/13093683x
发表时间: 2015
期刊: SIAM J. Numer. Anal.
影响因子: --
作者:
R. BeckerM. BittlD. Kuzmin
通讯作者: R. BeckerM. BittlD. Kuzmin