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Superconvergence and Asymptotic Expansions for Bilinear Finite Volume Element Approximations

Published online by Cambridge University Press:  28 May 2015

Cunyun Nie*
Affiliation:
Department of Mathematics and Physics, Hunan Institute of Engineering, Hunan 411104, China
Shi Shu*
Affiliation:
Hunan Key Laboratory for Computation & Simulation in Science and Engineering and Key Laboratory of Intelligent Computing & Information Processing of Ministry of Education, Xiangtan University, Hunan 411105, China
Haiyuan Yu*
Affiliation:
Hunan Key Laboratory for Computation & Simulation in Science and Engineering and Key Laboratory of Intelligent Computing & Information Processing of Ministry of Education, Xiangtan University, Hunan 411105, China
Juan Wu*
Affiliation:
Hunan Key Laboratory for Computation & Simulation in Science and Engineering and Key Laboratory of Intelligent Computing & Information Processing of Ministry of Education, Xiangtan University, Hunan 411105, China
*
Corresponding author.Email address:ncyl028@gmail.com
Corresponding author.Email address:shushi@xtu.edu.cn
Corresponding author.Email address:yuhaiyuan2118@sina.com
Corresponding author.Email address:12819023@qq.com
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Abstract

Aiming at the isoparametric bilinear finite volume element scheme, we initially derive an asymptotic expansion and a high accuracy combination formula of the derivatives in the sense of pointwise by employing the energy-embedded method on uniform grids. Furthermore, we prove that the approximate derivatives are convergent of order two. Finally, numerical examples verify the theoretical results.

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Type
Research Article
Copyright
Copyright © Global Science Press Limited 2013

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