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Multiscale electromagnetic problems occur frequently in practical applications. Unfortunately, the Finite Difference Time Domain (FDTD) method can lose its remarkable efficiency when small and large geometrical features are present simultaneously. Small geometrical features impose a fine spatial grid, increasing memory consumption and CPU time. Moreover, because of the Courant-Friedrichs-Lewy (CFL)...
Timestep in the Finite Difference Time Domain method (FDTD) is constrained by the Courant-Friedrichs-Lewy (CFL) limit. Several methods have been proposed to break the CFL barrier, including implicit formulations, spatial filtering, and projection of FDTD equations onto a stable subspace. In this work we present a novel approach based on model order reduction of FDTD equations. Compared to existing...
The timestep of the finite-difference time-domain method (FDTD) is constrained by the stability limit known as the Courant–Friedrichs–Lewy (CFL) condition. This limit can make FDTD simulations quite time consuming for structures containing small geometrical details. Several methods have been proposed in the literature to extend the CFL limit, including implicit FDTD methods and filtering techniques...
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