Vlasov-Maxwell方程的哈密顿粒子胞内方法

Yang He, Yajuan Sun, H. Qin, Jian Liu
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引用次数: 47

摘要

本文采用空间上的一致性有限元方法和时间上的分裂方法,建立了求解Vlasov-Maxwell方程的哈密顿粒子单元法。对于空间离散化,给出了选择有限元空间的准则,使得半离散系统具有离散的非正则泊松结构。我们对半离散系统在时间上应用哈密顿分裂方法,得到的算法是泊松保持的和显式的。该算法的保守性保证了对Vlasov-Maxwell方程组的长时间高效、准确的数值模拟。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Hamiltonian particle-in-cell methods for Vlasov-Maxwell equations
In this paper, we develop Hamiltonian particle-in-cell methods for Vlasov-Maxwell equations by applying conforming finite element methods in space and splitting methods in time. For the spatial discretisation, the criteria for choosing finite element spaces are presented such that the semi-discrete system possesses a discrete non-canonical Poisson structure. We apply a Hamiltonian splitting method to the semi-discrete system in time, then the resulting algorithm is Poisson preserving and explicit. The conservative properties of the algorithm guarantee the efficient and accurate numerical simulation of the Vlasov-Maxwell equations over long-time.
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