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基于外心对偶剖分的有限体积元法

孙凤芝1,2, 李永海1   

  1. 1. 吉林大学数学学院信息与计算科学系, 长春 130012; 2. 大庆师范学院 数学系, 大庆 163712
  • 收稿日期:2004-07-08 修回日期:1900-01-01 出版日期:2005-01-26 发布日期:2005-01-20
  • 通讯作者: 李永海

Finite Volume Element Method Based on Circumcenter Dual Subdivisions

SUN Feng-zhi1,2, LI Yong-hai1   

  1. 1. Department of Information and Computation, College of Mathematics, Jilin University, Changchun 130012, China;2. Department of Mathematics, Daqing Normal College, Daqing 163712, China
  • Received:2004-07-08 Revised:1900-01-01 Online:2005-01-26 Published:2005-01-20
  • Contact: LI Yong-hai

摘要: 考虑基于外心对偶剖分的椭圆型与抛物型方程的有限体积元法. 设原始三角形剖分的任意三角形单元的重心Q和外心C的距离满足|QC|=O(h2), 在此条件下, 证明了二阶椭圆型方程基于外心对偶剖分的有限体积元法的L2误差估计, 以及抛物型方程基于外心对偶剖分的半离散和全离散有限体积元格式L2和H1误差估计.

关键词: 三角形剖分, 对偶剖分, 有限体积元法, 误差估计

Abstract: We considered the finite volume element methods (FVM) based on circumcenter dual subdivision for the elliptic equations and parabolic equations. Let the primal triangular partition satisfy the restrictive condition, that is, the distances between the barycenter Q and the circumcenter C of any triangle element satisfy |QC|=O(h2), under this condition, firstly we have obtained the optimal L2 error estimates of the finite volume element method based on circumcenter dual subdivision for the elliptic equation, furthermore we have also proved the optimal L2 and H1 error estimates of the semi-discrete and fully-discrete finite volume element method based on circumcenter dual subdivision for parabolic equation.

Key words: triangular subdivision, dual subdivision, finite volume element method, error estimate

中图分类号: 

  • O241.82