A finite element based Heterogeneous Multiscale Method for the Landau-Lifshitz equation

11/22/2021

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by   Lena Leitenmaier, et al.

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We present a Heterogeneous Multiscale Method for the Landau-Lifshitz equation with a highly oscillatory diffusion coefficient, a simple model for a ferromagnetic composite. A finite element macro scheme is combined with a finite difference micro model to approximate the effective equation corresponding to the original problem. This makes it possible to obtain effective solutions to problems with rapid material variations on a small scale, described by ε≪ 1, which would be too expensive to resolve in a conventional simulation.