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arXiv 1302.4513math.NAcs.NA
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离散梯度方法具有能量守恒律

Discrete gradient methods have an energy conservation law

Robert I McLachlan, G R W Quispel

AI总结:

本文针对多种守恒型偏微分方程,证明设计为具有守恒量(称为能量)的离散梯度方法也具有时间离散的守恒律,其守恒密度与连续守恒律相同,而通量通过将连续通量中出现的守恒密度导数替换为离散梯度得到。

摘要:

我们展示了对于多种守恒型偏微分方程,设计为具有守恒量(此处称为能量)的离散梯度方法也具有时间离散的守恒律。该离散守恒律具有与连续守恒律相同的守恒密度,而其通量是通过将连续通量中出现的所有守恒密度导数替换为离散梯度而得到的。

英文摘要:

We show for a variety of classes of conservative PDEs that discrete gradient methods designed to have a conserved quantity (here called energy) also have a time-discrete conservation law. The discrete conservation law has the same conserved density as the continuous conservation law, while its flux is found by replacing all derivatives of the conserved density appearing in the continuous flux by discrete gradients.

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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