吉林大学学报(理学版) ›› 2019, Vol. 57 ›› Issue (3): 523-529.

• 数学 • 上一篇    下一篇

一类Poisson-Nernst-Planck方程的两网格有限元离散方法

唐鸣, 阳莺, 李雪芳   

  1. 桂林电子科技大学 数学与计算科学学院, 广西高校数据分析与计算重点实验室, 广西 桂林 541004
  • 收稿日期:2018-06-29 出版日期:2019-05-26 发布日期:2019-05-20
  • 通讯作者: 阳莺 E-mail:yyang@guet.edu.cn

Two-Grid Finite Element Discretization Methods for a Class of Poisson-Nernst-Planck Equations#br#

TANG Ming, YANG Ying, LI Xuefang   

  1. Guangxi Colleges and Universities Key Laboratory of Data Analysis and Computation,School of Mathematics and Computational Science,Guilin University of Electronic Technology, Guilin 541004, Guangxi Zhuang Autonomous Region, China
  • Received:2018-06-29 Online:2019-05-26 Published:2019-05-20
  • Contact: YANG Ying E-mail:yyang@guet.edu.cn

摘要: 应用两网格有限元方法离散求解一类Poisson-Nernst-Planck(PNP)方程. 通过两网格离散, 将耦合PNP系统解耦成较小规模的线性对称系统, 可有效降低计算复杂度. 理论结果表明, 线性对称化的两网格算法具有与传统有限元方法相同的误差阶; 数值结果表明, 相比于传统有限元方法, 该方法计算效率更高.

关键词: Poisson-Nernst-Planck(PNP)方程, 两网格方法, 有限元方法, 线性化, 对称化

Abstract: A two-grid finite element method was used to solve a class of Poisson-Nernst-Planck (PNP) equations discretely.
By the two-grid discretization, the coupled PNP system was decoupled into a small scale linear symmetric system, which could effectively reduce the computational complexity. The theoretical results show that the linear symmetry two\|grid algorithm has the same error order as the traditional finite element method. The numerical results show that the method has higher computational efficiency than the traditional finite element method.

Key words: Poisson-Nernst-Planck (PNP) equations, two\, grid method,  , finite element method, linearization, symmetrization

中图分类号: 

  • O241.82