Non-oscillatory entropy stable DG schemes for hyperbolic conservation law
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866917957215453184 |
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| author | Liu, Yuchang Guo, Wei Jiang, Yan Zhang, Mengping |
| author_facet | Liu, Yuchang Guo, Wei Jiang, Yan Zhang, Mengping |
| contents | In this paper, we propose a class of non-oscillatory, entropy-stable discontinuous Galerkin (NOES-DG) schemes for solving hyperbolic conservation laws. By incorporating a specific form of artificial viscosity, our new scheme directly controls entropy production and suppresses spurious oscillations. To address the stiffness introduced by the artificial terms, which can restrict severely time step sizes, we employ the integration factor strong stability-preserving Runge-Kutta method for time discretization. Furthermore, our method remains compatible with positivity-preserving limiters under suitable CFL conditions in extreme cases. Various numerical examples demonstrate the efficiency of the proposed scheme, showing that it maintains high-order accuracy in smooth regions and avoids spurious oscillations near discontinuities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_16729 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Non-oscillatory entropy stable DG schemes for hyperbolic conservation law Liu, Yuchang Guo, Wei Jiang, Yan Zhang, Mengping Numerical Analysis In this paper, we propose a class of non-oscillatory, entropy-stable discontinuous Galerkin (NOES-DG) schemes for solving hyperbolic conservation laws. By incorporating a specific form of artificial viscosity, our new scheme directly controls entropy production and suppresses spurious oscillations. To address the stiffness introduced by the artificial terms, which can restrict severely time step sizes, we employ the integration factor strong stability-preserving Runge-Kutta method for time discretization. Furthermore, our method remains compatible with positivity-preserving limiters under suitable CFL conditions in extreme cases. Various numerical examples demonstrate the efficiency of the proposed scheme, showing that it maintains high-order accuracy in smooth regions and avoids spurious oscillations near discontinuities. |
| title | Non-oscillatory entropy stable DG schemes for hyperbolic conservation law |
| topic | Numerical Analysis |
| url | https://arxiv.org/abs/2410.16729 |