数学物理学报(英文版) ›› 2018, Vol. 38 ›› Issue (4): 1361-1369.

• 论文 • 上一篇    下一篇

OPTIMAL ERROR ESTIMATES OF A DECOUPLED SCHEME BASED ON TWO-GRID FINITE ELEMENT FOR MIXED NAVIER-STOKES/DARCY MODEL

秦毅, 侯延仁   

  1. School of Mathematics and Statistics, Xi'an Jiaotong University, Xi'an 710049, China
  • 收稿日期:2016-06-08 修回日期:2017-04-30 出版日期:2018-08-25 发布日期:2018-08-25
  • 作者简介:Yi QIN,E-mail:qinyi1991@stu.xjtu.edu.cn;Yanren HOU,E-mail:yrhou@mail.xjtu.edu.cn
  • 基金资助:

    Subsidized by NSFC (11571274 and 11171269) and the Ph.D. Programs Foundation of Ministry of Education of China (20110201110027).

OPTIMAL ERROR ESTIMATES OF A DECOUPLED SCHEME BASED ON TWO-GRID FINITE ELEMENT FOR MIXED NAVIER-STOKES/DARCY MODEL

Yi QIN, Yanren HOU   

  1. School of Mathematics and Statistics, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2016-06-08 Revised:2017-04-30 Online:2018-08-25 Published:2018-08-25
  • Supported by:

    Subsidized by NSFC (11571274 and 11171269) and the Ph.D. Programs Foundation of Ministry of Education of China (20110201110027).

摘要:

Although the two-grid finite element decoupled scheme for mixed Navier-Stokes/Darcy model in literatures has given the numerical results of optimal convergence order, the theoretical analysis only obtain the optimal error order for the porous media flow and a non-optimal error order for the fluid flow. In this article, we give a more rigorous of the error analysis for the fluid flow and obtain the optimal error estimates of the velocity and the pressure.

关键词: Navier-Stokes equation, Darcy's law, two-grid method, optimal error estimate

Abstract:

Although the two-grid finite element decoupled scheme for mixed Navier-Stokes/Darcy model in literatures has given the numerical results of optimal convergence order, the theoretical analysis only obtain the optimal error order for the porous media flow and a non-optimal error order for the fluid flow. In this article, we give a more rigorous of the error analysis for the fluid flow and obtain the optimal error estimates of the velocity and the pressure.

Key words: Navier-Stokes equation, Darcy's law, two-grid method, optimal error estimate