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arXiv 2501.04620math.NAcs.NA
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一类带间断通量守恒律的中心型MUSCL格式分析

Analysis of a central MUSCL-type scheme for conservation laws with discontinuous flux

Nikhil Manoj, Sudarshan Kumar K

AI总结:

针对带间断通量的标量守恒律,提出带网格依赖修正项的Nessyahu-Tadmor型二阶中心MUSCL格式,用补偿紧性理论证明其收敛到熵解,并通过数值算例验证。

摘要:

本文针对一类带间断通量的标量守恒律,提出一种Nessyahu-Tadmor型二阶中心格式,并给出其收敛性分析。由于带间断通量问题的解通常不属于有界变差(BV)空间,我们采用补偿紧性理论来建立近似解的收敛性。分析的核心部分包括推导最大值原理,以及证明由近似解构造的序列具有$\boldsymbol{\rm W}^{-1,2}_{\rm loc}$紧性,后者通过推导近似解的若干关键估计实现。此外,通过在斜率限制器中引入依赖网格的修正项,我们证明所提二阶格式生成的数值解收敛于熵解。最后,我们通过数值算例验证了理论结果。

英文摘要:

In this article, we propose a second-order central scheme of the Nessyahu-Tadmor-type for a class of scalar conservation laws with discontinuous flux and present its convergence analysis. Since solutions to problems with discontinuous flux generally do not belong to the space of bounded variation (BV), we employ the theory of compensated compactness to establish the convergence of approximate solutions. A major component of our analysis involves deriving the maximum principle and showing the $\mathrm{W}^{-1,2}_{\mathrm{loc}}$ compactness of a sequence constructed from approximate solutions. The latter is achieved through the derivation of several essential estimates on the approximate solutions. Furthermore, by incorporating a mesh-dependent correction term in the slope limiter, we show that the numerical solutions generated by the proposed second-order scheme converge to the entropy solution. Finally, we validate our theoretical results by presenting numerical examples.

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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