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守恒律通量的计算

Computation of fluxes of conservation laws

Department of Mathematics and Statistics, University of Saskatchewan(萨斯喀彻温大学数学与统计系)

Alexei F. Cheviakov

AI总结:

本文综述了偏微分方程局部守恒律通量的计算方法,包括直接法、同伦法等,并通过示例和符号软件实现进行比较。

摘要:

偏微分方程(PDE)局部守恒律的直接构造方法是一种系统方法,适用于广泛的PDE系统[Anco S. and Bluman G., Direct construction method for conservation laws of partial differential equations Part II: General treatment. {\sl Europ. J. Appl. Math.} {f 13}, 567--585 (2002)]。在直接法中,寻找乘子,使得给定系统的PDEs与这些乘子的线性组合产生一个散度表达式。在找到局部守恒律乘子后,需要重构守恒律的通量。在这篇综述论文中,我们讨论了通量计算的常用方法,进行了比较,并通过示例加以说明。还介绍了这些方法在符号软件中的实现。

英文摘要:

The direct method of construction of local conservation laws of partial differential equations (PDE) is a systematic method applicable to a wide class of PDE systems [Anco S. and Bluman G., Direct construction method for conservation laws of partial differential equations Part II: General treatment. {\sl Europ. J. Appl. Math.} {\bf 13}, 567--585 (2002)]. Within the direct method, one seeks multipliers, such that the linear combination of PDEs of a given system with these multipliers yields a divergence expression. After local conservation law multipliers are found, one needs to reconstruct the fluxes of the conservation law. In this review paper, we discuss common methods of flux computation, compare them, and illustrate by examples. An implementation of these methods in symbolic software is also presented.

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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