Discontinuous Galerkin Methods for Maxwell's Equations in Drude Metamaterials on Unstructured Meshes
Document Type
Article
Publication Date
4-24-2018
Publication Title
Journal of Computational and Applied Mathematics
Volume
342
First page number:
147
Last page number:
163
Abstract
In this follow-up work, we extend the discontinuous Galerkin (DG) methods previously developed on rectangular meshes (Li et al., 2017) to triangular meshes. The DG schemes in Li et al. (2017) are both optimally convergent and energy conserving. However, as we shall see in the numerical results section, the DG schemes on triangular meshes only have suboptimal convergence rate. We prove the energy conservation and an error estimate for the semi-discrete schemes. The stability of the fully discrete scheme is proved and its error estimate is stated. We present extensive numerical results with convergence consistent of our error estimate, and simulations of wave propagation in Drude metamaterials to demonstrate the flexibility of triangular meshes.
Keywords
Discontinuous Galerkin methods; Maxwell's equations; Metamaterials; Backward wave progagation
Disciplines
Applied Mathematics
Language
English
Repository Citation
Shi, C.,
Li, J.,
Shu, C.
(2018).
Discontinuous Galerkin Methods for Maxwell's Equations in Drude Metamaterials on Unstructured Meshes.
Journal of Computational and Applied Mathematics, 342
147-163.
http://dx.doi.org/10.1016/j.cam.2018.04.011