Higher-order gradient post-processings for second-order elliptic problems

被引：32
|
作者：
Loula, AFD [1 ]
Rochinha, FA [1 ]
Murad, MA [1 ]
机构：
[1] UFRJ, COPPE, PEM, BR-21945970 RIO DE JANEIRO, BRAZIL
来源：
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING | 1995年 / 128卷 / 3-4期
关键词：
D O I：
10.1016/0045-7825(95)00885-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Global, element-by-element and macroelement post-processing recovery techniques based on least-square residuals of equilibrium equation and irrotationality condition are proposed for second-order elliptic problems. Improved accuracy for the flux finite element approximations is obtained with low computational cost and easy implementation. Error estimates are derived and numerical experiments are reported confirming the higher-order rates of convergence predicted in the analysis.
引用
收藏
页码：361 / 381
页数：21
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