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- W4380136142 abstract "We present an adaptive-order positivity-preserving conservative finite-difference scheme that allows a high-order solution away from shocks and discontinuities while guaranteeing positivity and robustness at discontinuities. This is achieved by monitoring the relative power in the highest mode of the reconstructed polynomial and reducing the order when the polynomial series no longer converges. Our approach is similar to the multidimensional optimal order detection (MOOD) strategy, but differs in several ways. The approach is a priori and so does not require retaking a time step. It can also readily be combined with positivity-preserving flux limiters that have gained significant traction in computational astrophysics and numerical relativity. This combination ultimately guarantees a physical solution both during reconstruction and time stepping. We demonstrate the capabilities of the method using a standard suite of very challenging 1d, 2d, and 3d general relativistic magnetohydrodynamics test problems." @default.
- W4380136142 created "2023-06-10" @default.
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- W4380136142 date "2023-06-07" @default.
- W4380136142 modified "2023-09-24" @default.
- W4380136142 title "A positivity-preserving adaptive-order finite-difference scheme for GRMHD" @default.
- W4380136142 doi "https://doi.org/10.48550/arxiv.2306.04755" @default.
- W4380136142 hasPublicationYear "2023" @default.
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