Communications on Applied Mathematics and Computation ›› 2025, Vol. 7 ›› Issue (2): 485-535.doi: 10.1007/s42967-023-00347-w

• ORIGINAL PAPERS • 上一篇    下一篇

Error Estimates of Finite Element Method for the Incompressible Ferrohydrodynamics Equations

Shipeng Mao1,2, Jiaao Sun1,2   

  1. 1 LSEC and ICMSEC, Academy of Mathematics and Systems Science, University of Chinese Academy of Sciences, Beijing 100190, China;
    2 Chinese Academy of Sciences, School of Mathematical Science, University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2023-09-21 修回日期:2023-10-21 接受日期:2023-10-28 出版日期:2025-06-20 发布日期:2025-04-21
  • 通讯作者: Shipeng Mao,maosp@lsec.cc.ac.cn;Jiaao Sun,sunjiaao@lsec.cc.ac.cn E-mail:maosp@lsec.cc.ac.cn;sunjiaao@lsec.cc.ac.cn
  • 基金资助:
    This work is supported by the National Natural Science Foundation of China (Nos. 12271514, 11871467, 12161141017) and the National Key Research and Development Program of China (2023YFC3705701).

Error Estimates of Finite Element Method for the Incompressible Ferrohydrodynamics Equations

Shipeng Mao1,2, Jiaao Sun1,2   

  1. 1 LSEC and ICMSEC, Academy of Mathematics and Systems Science, University of Chinese Academy of Sciences, Beijing 100190, China;
    2 Chinese Academy of Sciences, School of Mathematical Science, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2023-09-21 Revised:2023-10-21 Accepted:2023-10-28 Online:2025-06-20 Published:2025-04-21
  • Supported by:
    This work is supported by the National Natural Science Foundation of China (Nos. 12271514, 11871467, 12161141017) and the National Key Research and Development Program of China (2023YFC3705701).

摘要: In this paper, we consider the Shliomis ferrofluid model and study its numerical approximation. We investigate a first-order energy-stable fully discrete finite element scheme for solving the simplified ferrohydrodynamics (SFHD) equations. First, we establish the wellposedness and some regularity results for the solution of the SFHD model. Next we study the Euler semi-implicit time-discrete scheme for the SFHD systems and derive the L2-H1 error estimates for the time-discrete solution. Moreover, certain regularity results for the time-discrete solution are proved rigorously. With the help of these regularity results, we prove the unconditional L2-H1 error estimates for the finite element solution of the SFHD model. Finally, some three-dimensional numerical examples are carried out to demonstrate both the accuracy and efficiency of the fully discrete finite element scheme.

关键词: Shliomis model, Ferrofluids, Euler semi-implicit scheme, Mixed finite element methods, Error estimates, Unconditional convergence

Abstract: In this paper, we consider the Shliomis ferrofluid model and study its numerical approximation. We investigate a first-order energy-stable fully discrete finite element scheme for solving the simplified ferrohydrodynamics (SFHD) equations. First, we establish the wellposedness and some regularity results for the solution of the SFHD model. Next we study the Euler semi-implicit time-discrete scheme for the SFHD systems and derive the L2-H1 error estimates for the time-discrete solution. Moreover, certain regularity results for the time-discrete solution are proved rigorously. With the help of these regularity results, we prove the unconditional L2-H1 error estimates for the finite element solution of the SFHD model. Finally, some three-dimensional numerical examples are carried out to demonstrate both the accuracy and efficiency of the fully discrete finite element scheme.

Key words: Shliomis model, Ferrofluids, Euler semi-implicit scheme, Mixed finite element methods, Error estimates, Unconditional convergence

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