Acta mathematica scientia,Series A ›› 2023, Vol. 43 ›› Issue (3): 829-854.

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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)

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

CLC Number: 

  • O241.82
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