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arXiv 1602.02128math.APcs.NAmath.NA
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时间显式有限体积近似强解的误差估计

Error estimate for time-explicit finite volume approximation of strong solutions to systems of conservation laws

Inria Lille – Nord Europe(法国国家信息与自动化研究所里尔-北欧中心);Université de Nantes(南特大学)

Clément Cancès, Hélène Mathis, Nicolas Seguin

AI总结:

本文研究非线性守恒律系统强解的有限体积近似,采用无结构网格上的时间显式方案,并利用熵满足的数值通量,推导出在加强CFL条件下多维情况下的误差估计,得到L^2范数下的经典h^1/4估计。

摘要:

我们研究非线性守恒律系统强解的有限体积近似。我们关注无结构网格上的时间显式方案,具有熵满足的数值通量。在每个网格界面处量化数值熵耗散,这使得可以在加强CFL条件下证明数值近似的弱-BV估计。然后我们利用强解与其有限体积近似之间的相对熵,推导出多维情况下的误差估计。误差项被仔细研究,导致在加强CFL条件下L^2范数下的经典h^1/4估计。

英文摘要:

We study the finite volume approximation of strong solutions to nonlinear systems of conservation laws. We focus on time-explicit schemes on unstructured meshes, with entropy satisfying numerical fluxes. The numerical entropy dissipation is quantified at each interface of the mesh, which enables to prove a weak--BV estimate for the numerical approximation under a strengthen CFL condition. Then we derive error estimates in the multidimensional case, using the relative entropy between the strong solution and its finite volume approximation. The error terms are carefully studied, leading to a classical $h^1/4$ estimate in $L^2$ under this strengthen CFL condition.

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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