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arXiv 2108.07385physics.comp-phcs.NAmath.NAphysics.class-ph
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哈密顿形式的宏观麦克斯韦方程组的拟离散

A mimetic discretization of the macroscopic Maxwell equations in Hamiltonian form

William Barham, Yaman Güçlü, Philip J. Morrison, Eric Sonnendrücker

摘要:

利用一种新的Galerkin投影Hodge星算子,对宏观麦克斯韦方程组的Hamilton形式进行了拟谱元离散.分离纯拓扑和度量相关量的想法在哈密顿建模框架中是自然的,因为泊松括号是无度量的,哈密顿包含所有度量信息。这一思想可以通过直接离散庞加莱二元结构来融入到模拟谱元方法中。这种“分裂外演算模拟谱元法”产生的空间离散麦克斯韦方程组是哈密尔顿和严格和强烈保存高斯定律。此外,新的离散霍奇星算子本身是感兴趣的霍奇星算子的纯拓扑和度量依赖部分的分区。作为一个简单的测试情况下,应用这种方法的数值结果的一维版本的麦克斯韦方程组。

英文摘要:

A mimetic spectral element discretization, utilizing a novel Galerkin projection Hodge star operator, of the macroscopic Maxwell equations in Hamiltonian form is presented. The idea of splitting purely topological and metric dependent quantities is natural in the Hamiltonian modeling framework as the Poisson bracket is metric free with the Hamiltonian containing all metric information. This idea may be incorporated into the mimetic spectral element method by directly discretizing the Poincaré duality structure. This "split exterior calculus mimetic spectral element method" yields spatially discretized Maxwell's equations which are Hamiltonian and exactly and strongly conserve Gauss's laws. Moreover, the new discrete Hodge star operator is itself of interest as a partition of the purely topological and metric dependent portions of the Hodge star operator. As a simple test case, the numerical results of applying this method to a one-dimensional version of Maxwell's equations are given.

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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