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arXiv 2009.00102math.NAcs.NA
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多辛偏微分方程有限元离散的离散守恒律

Discrete conservation laws for finite element discretisations of multisymplectic PDEs

Elena Celledoni, James Jackaman

摘要:

在这项工作中,我们提出了一个新的,任意阶时空有限元离散哈密顿偏微分方程的多辛公式。我们证明了新的方法,这是通过使用连续和不连续的空间离散,承认一个局部和整体的能量守恒律。我们还证明了离散方程解的存在唯一性。此外,我们说明的错误行为和建议的离散化在广泛的数值实验中的线性和非线性波动方程和非线性薛定谔方程的守恒性质。

英文摘要:

In this work we propose a new, arbitrary order space-time finite element discretisation for Hamiltonian PDEs in multisymplectic formulation. We show that the new method which is obtained by using both continuous and discontinuous discretisations in space, admits a local and global conservation law of energy. We also show existence and uniqueness of solutions of the discrete equations. Further, we illustrate the error behaviour and the conservation properties of the proposed discretisation in extensive numerical experiments on the linear and nonlinear wave equation and on the nonlinear Schrödinger equation.

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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