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arXiv 2006.14971math.AP
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具有$δ\,-$激波解的双曲型方程组的保正数值格式及其收敛性分析

Positivity--preserving numerical scheme for hyperbolic systems with $δ\,-$ shock solutions and its convergence analysis

Aekta Aggarwal, Ganesh Vaidya, G. D. Veerappa Gowda

摘要:

本文提出了一类双曲型方程组的Goddern型数值格式,并考虑了非经典$δ-$激波。结果表明,该数值逼近收敛于解,并保持了系统的物理性质,如正密度和有界速度。通过引入适当的斜率限制器,将该格式推广到保正性和保速度界的二阶精度格式。数值结果与现有的文献进行了比较,该计划被证明是有效地捕获的解决方案。本文提出了一个双曲型方程组,通过将方程组适当解耦为两个具有间断通量的标量守恒律,构造了一个熵满足格式。

英文摘要:

Godunov type numerical schemes for the class of hyperbolic systems, admitting non-classical $δ-$ shocks are proposed. It is shown that the numerical approximations converge to the solution and preserve the physical properties of the system such as positive density and bounded velocity. The scheme has been extended to positivity preserving and velocity bound preserving second-order accurate scheme by using appropriate slope limiters. The numerical results are compared with the existing the literature and the scheme is shown to capture the solution efficiently. The paper presents a hyperbolic system, for which an entropy satisfying scheme is constructed through an appropriate decoupling of the system into two scalar conservation laws with discontinuous flux.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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