吉林大学学报(理学版)

• 数学 •    下一篇

求解时间相关Brinkman方程弱有限元方法的误差估计

孙立娜, 王秀丽, 王一博, 周倩   

  1. 吉林大学 数学学院, 长春 130012
  • 收稿日期:2016-11-17 出版日期:2017-05-26 发布日期:2017-05-31
  • 通讯作者: 王秀丽 E-mail:xiuli16@mails.jlu.edu.cn

Error Estimation of Weak Galerkin Finite Element Methodfor Solving Time-Dependent Brinkman Equation

SUN Lina, WANG Xiuli, WANG Yibo, ZHOU Qian   

  1. College of Mathematics, Jilin University, Changchun 130012, China
  • Received:2016-11-17 Online:2017-05-26 Published:2017-05-31
  • Contact: WANG Xiuli E-mail:xiuli16@mails.jlu.edu.cn

摘要: 采用弱有限元方法求解时间相关Brinkman方程. 通过仅对空间离散的半离散格式, 及对时间和空间均离散的全离散格式分别构造相应的误差方程进
行误差分析, 得到了速度函数在H1和L2范数, 压力函数在H1范数下的最优阶误差估计, 从而使弱有限元方法应用更广泛.

关键词: 时间相关Brinkman方程, 标量离散弱梯度, 弱有限元方法, 向量离散弱梯度

Abstract: We solved timedependent Brinkman equation by the weak Galerkin finite element method. Corresponding error equations and error estimates were established by using semidiscrete scheme only for the discrete space and fulldiscrete scheme for the time and space discretization. We obtained the optimal rate convergence in H1 and L2 norm for the velocity function, and in H1 norm for the pressure function. So that the weak Galerkin finite element method was applied more widely.

Key words: weak Galerkin finite element method, vector discrete weak gradient, scalar discrete weak gradient, timedependent Brinkman equation

中图分类号: 

  • O241.8