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- W3202348133 abstract "We present a discontinuous Galerkin-finite-difference hybrid scheme that allows high-order shock capturing with the discontinuous Galerkin method for general relativistic magnetohydrodynamics. The hybrid method is conceptually quite simple. An unlimited discontinuous Galerkin candidate solution is computed for the next time step. If the candidate solution is inadmissible, the time step is retaken using robust finite-difference methods. Because of its a posteriori nature, the hybrid scheme inherits the best properties of both methods. It is high-order with exponential convergence in smooth regions, while robustly handling discontinuities. We give a detailed description of how we transfer the solution between the discontinuous Galerkin and finite-difference solvers, and the troubled-cell indicators necessary to robustly handle slow-moving discontinuities and simulate magnetized neutron stars. We demonstrate the efficacy of the proposed method using a suite of standard and very challenging 1d, 2d, and 3d relativistic magnetohydrodynamics test problems. The hybrid scheme is designed from the ground up to efficiently simulate astrophysical problems such as the inspiral, coalescence, and merger of two neutron stars." @default.
- W3202348133 created "2021-10-11" @default.
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- W3202348133 creator A5059896049 @default.
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- W3202348133 date "2022-08-26" @default.
- W3202348133 modified "2023-10-16" @default.
- W3202348133 title "A high-order shock capturing discontinuous Galerkin–finite difference hybrid method for GRMHD" @default.
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- W3202348133 doi "https://doi.org/10.1088/1361-6382/ac8864" @default.
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