A Convergent Linearized Lagrange Finite Element Method for the Magneto-hydrodynamic Equations in Two-Dimensional Nonsmooth and Nonconvex Domains
Abstract
A new fully discrete linearized $H^1$-conforming Lagrange finite element method is proposed for solving the two-dimensional magneto-hydrodynamics equations based on a magnetic potential formulation. The proposed method yields numerical solutions that converge in general domains that may be nonconvex, nonsmooth, and multiconnected. The convergence of subsequences of the numerical solutions is proved only based on the regularity of the initial conditions and source terms without extra assumptions on the regularity of the solution. Strong convergence in $L^2(0,T;{L}^2(\Omega))$ was proved for the numerical solutions of both ${\bm u}$ and ${\bm H}$ without any mesh restriction.
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© 2020, Society for Industrial and Applied Mathematics.
History
Submitted: 6 August 2018
Accepted: 5 December 2019
Published online: 23 January 2020
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Funding Information
Hong Kong Research Grants Council : 15301818
Air Force Office of Scientific Research https://doi.org/10.13039/100000181 : FA9550-15-1-0001
National Natural Science Foundation of China https://doi.org/10.13039/501100001809 : 91630205, 11771068
National Science Foundation https://doi.org/10.13039/100000001 : DMS-1315259
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