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- W3021538997 abstract "Abstract In this paper we propose and analyze a mixed discontinuous Galerkin (DG) method and an hybridizable DG (HDG) method for the stationary magnetohydrodynamics (MHD) equations with two types of boundary (or constraint) conditions. The mixed DG method is based on a recent work proposed by Houston et al. (2009, A mixed DG method for linearized incompressible magnetohydrodynamics. J. Sci. Comput., 40, 281–314) for the linearized MHD. With two novel discrete Sobolev embedding type estimates for the discontinuous polynomials, we provide a priori error estimates for the method on the nonlinear MHD equations. In the smooth case we have optimal convergence rate for the velocity, magnetic field and pressure in the energy norm; the Lagrange multiplier only has suboptimal convergence order. With the minimal regularity assumption on the exact solution, the approximation is optimal for all unknowns. To the best of our knowledge, these are the first a priori error estimates for DG methods for the nonlinear MHD equations. In addition, we also propose and analyze the first divergence-free HDG method for the problem with several unique features comparing with the mixed DG method." @default.
- W3021538997 created "2020-05-13" @default.
- W3021538997 creator A5059376708 @default.
- W3021538997 creator A5064099494 @default.
- W3021538997 date "2019-01-15" @default.
- W3021538997 modified "2023-10-16" @default.
- W3021538997 title "A mixed DG method and an HDG method for incompressible magnetohydrodynamics" @default.
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- W3021538997 doi "https://doi.org/10.1093/imanum/dry095" @default.
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