A defect-correction nodal finite element method for time-dependent Maxwell's equations on polygonal domains
DOI:
https://doi.org/10.33993/jnaat551-1664Keywords:
Maxwell's Equations, Crank-Nicolson Method, Singular functionAbstract
This paper develops a nodal finite element Crank-Nicolson method of lines to solve the time-dependent Maxwell's equations on polygonal domains with reentrant corners. Nodal Finite Element methods are used to solve Maxwell's equations with an optimal convergence rate when the domain is convex or has a smooth boundary, but may fail to converge if the domain has a reentrant corner. The Defect-Correction method presented is based on a decomposition of the solution in terms of Fourier and Bessel's series, an extraction of the singular function and an approximation of the regular part of the solution. Optimal convergence results are recovered using the method in both the energy norm or the $L^2$-norm.
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