arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.08003math.NAcs.NA
收藏

非线性Maxwell方程的高阶无源保持格式

On higher order passivity preserving schemes for nonlinear Maxwell's equations

Herbert Egger, Vsevolod Shashkov

摘要:

我们提出了两种策略,设计无源性保持高阶离散方法的非线性克尔型介质中的麦克斯韦方程组。这两种方法都是基于变分近似计划在空间和时间。这允许严格证明能量守恒或耗散,从而在完全离散的水平上无源性。对于线性介质,所提出的方法与混合有限元和隐式Runge-Kutta格式的某些组合相吻合。在数值试验中,对于非线性问题,也观察到了阶最优的收敛速度,这对于线性问题是可以预期的。

英文摘要:

We present two strategies for designing passivity preserving higher order discretization methods for Maxwell's equations in nonlinear Kerr-type media. Both approaches are based on variational approximation schemes in space and time. This allows to rigorously prove energy conservation or dissipation, and thus passivity, on the fully discrete level. For linear media, the proposed methods coincide with certain combinations of mixed finite element and implicit Runge-Kutta schemes. The order optimal convergence rates, which can thus be expected for linear problems, are also observed for nonlinear problems in the numerical tests.

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。

↑