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首页> 外文期刊>Journal of Computational Physics >Entropy stable discontinuous Galerkin methods for ten-moment Gaussian closure equations
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Entropy stable discontinuous Galerkin methods for ten-moment Gaussian closure equations

机译:熵稳定的不连续的Galerkin方法,用于十四轮高斯闭合方程

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摘要

In this article, we propose high order discontinuous Galerkin entropy stable schemes for ten-moment Gaussian closure equations, based on the suitable quadrature rules (see [1]). The key components of the proposed schemes are the use of an entropy conservative numerical flux [2] in each cell and an appropriate entropy stable numerical flux at the cell edges. These fluxes are then used in the entropy stable DG framework of [1] to obtain entropy stability of the semi-discrete schemes. We also extend these schemes to a source term that models plasma laser interaction. For the time discretization, we use strong stability preserving methods. The proposed schemes are then tested on several test cases to demonstrate stability, accuracy and robustness. (C) 2021 Elsevier Inc. All rights reserved.
机译:在本文中,我们基于合适的求积规则(见[1]),提出了十矩高斯闭包方程的高阶间断伽辽金熵稳定格式。提出的方案的关键部分是在每个单元中使用熵守恒数值通量[2],在单元边缘使用适当的熵稳定数值通量。然后在[1]的熵稳定DG框架中使用这些通量,以获得半离散格式的熵稳定性。我们还将这些方案扩展到模拟等离子体-激光相互作用的源项。对于时间离散,我们使用了强稳定性保持方法。然后在几个测试用例上对所提出的方案进行测试,以证明其稳定性、准确性和鲁棒性。(c)2021爱思唯尔公司保留所有权利。

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