数学物理学报 ›› 2023, Vol. 43 ›› Issue (3): 829-854.

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非定常 Stokes/Darcy 模型一种新的time filter 算法的分析

王阳1(),李剑1(),李祎2(),秦毅1,*()   

  1. 1陕西科技大学数学与数据科学学院 西安710021
    2西北大学数学学院 西安710127
  • 收稿日期:2022-07-25 修回日期:2022-10-10 出版日期:2023-06-26 发布日期:2023-06-01
  • 通讯作者: 秦毅 E-mail:210911017@sust.edu.cn;jianli@sust.edu.cn;liyizz@nwu.edu.cn;4545@sust.edu.cn
  • 作者简介:王阳,E-mail: 210911017@sust.edu.cn;|李剑,E-mail: jianli@sust.edu.cn;|李祎,E-mail: liyizz@nwu.edu.cn
  • 基金资助:
    国家自然科学基金(12001347);国家自然科学基金(11771259);国家自然科学基金(12101494);陕西省教育厅科研项目(21JK0935);陕西省教育厅创新团队项目(21JP013);陕西省教育厅创新团队项目(21JP019);陕西省自然科学基金(2021-426);陕西省人工智能联合实验室(2022JC-SYS-05);陕西省自然科学基础研究计划重点项目(2023-JC-ZD-02)

Analysis of a New Time Filter Algorithm for the Unsteady Stokes/Darcy Model

Wang Yang1(),Li Jian1(),Li Yi2(),Qin Yi1,*()   

  1. 1School of Mathematics and Data Science, Shaanxi University of Science and Technology, Xi'an 710021
    2School of Mathematics, Northwest University, Xi'an 710127
  • Received:2022-07-25 Revised:2022-10-10 Online:2023-06-26 Published:2023-06-01
  • Contact: Yi Qin E-mail:210911017@sust.edu.cn;jianli@sust.edu.cn;liyizz@nwu.edu.cn;4545@sust.edu.cn
  • Supported by:
    NSFC(12001347);NSFC(11771259);NSFC(12101494);Scientific Research Program Funded by Shaanxi Provincial Education Department(21JK0935);Innovative Team Project of Shaanxi Provincial Department of Education(21JP013);Innovative Team Project of Shaanxi Provincial Department of Education(21JP019);Natural Science Foundation of Shaanxi Province(2021-426);Shaanxi Provincial Joint Laboratory of Artificial Intelligence(2022JC-SYS-05);Shaanxi Province Natural Science Basic Research Program Key Project(2023-JC-ZD-02)

摘要:

首先, 在非定常 Stokes/Darcy 模型的线性多步法的一阶 $\theta$ -格式的基础上, 该文结合time filter 算法在几乎不增加计算量的情况下有效地将线性多步法的收敛阶由一阶提高到二阶, 从而提出一种新的高效数值算法. 其次, 该文分别对耦合和解耦的线性多步法加 time filter 算法的稳定性和误差估计进行了理论分析. 最后, 数值实验进一步展示了耦合和解耦算法的有效性, 收敛性和高效性.

关键词: Stokes/Darcy 模型, 线性多步法, Time filter 算法, 二阶收敛

Abstract:

Firstly, based on the first-order $\theta$-scheme of the Linear Multistep method for the unsteady Stokes/Darcy model, this paper combines the time filter algorithm to effectively improve the convergence order of the Linear Multistep method from first order to second order almost without increasing the amount of calculation, and a new efficient numerical algorithm is proposed. Secondly, the stability and error estimation of the coupled and decoupled Linear Multistep method plus time filter algorithm are analyzed theoretically. Finally, numerical experiments further demonstrate the effectiveness, convergence and efficiency of the coupled and decoupled algorithms.

Key words: Stokes/Darcy model, Linear Multistep method, Time filter algorithm, Second order convergence

中图分类号: 

  • O241.82