Research article

Convergence analysis and error estimate of finite element method of a nonlinear fluid-structure interaction problem

  • Received: 25 April 2020 Accepted: 08 June 2020 Published: 18 June 2020
  • MSC : Primary 35J20; Secondary 65N08, 76D05

  • In this paper, a semi-discrete finite element method for the nonlinear fluid-structure interaction problem interacts between the Navier-Stokes fluids and linear elastic solids, is studied and developed. A classical mixed variational principle of the weak formulation is given, and the corresponding finite element method is defined. As for the nonlinearity arising from the nonlinear interaction problem, we consider in time of a solution for suitably small data, and uniqueness hypothesis. This approach is fairly robust and adapts to the important case of interface with fractures or cracks. Convergence and estimate of the finite element method are also obtained for the nonlinear fluid-structure interaction problem. Finally, numerical experiments are presented to show the performance of the proposed method.

    Citation: Xin Zhao, Xin Liu, Jian Li. Convergence analysis and error estimate of finite element method of a nonlinear fluid-structure interaction problem[J]. AIMS Mathematics, 2020, 5(5): 5240-5260. doi: 10.3934/math.2020337

    Related Papers:

  • In this paper, a semi-discrete finite element method for the nonlinear fluid-structure interaction problem interacts between the Navier-Stokes fluids and linear elastic solids, is studied and developed. A classical mixed variational principle of the weak formulation is given, and the corresponding finite element method is defined. As for the nonlinearity arising from the nonlinear interaction problem, we consider in time of a solution for suitably small data, and uniqueness hypothesis. This approach is fairly robust and adapts to the important case of interface with fractures or cracks. Convergence and estimate of the finite element method are also obtained for the nonlinear fluid-structure interaction problem. Finally, numerical experiments are presented to show the performance of the proposed method.


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