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A physical time step size of [10.sup.-5] s was used to keep the Courant-Friedrichs-Lewy (CFL) number below 1 for essentially (>99.9 %) all cells in the domain.
The traditional finite-difference time-domain (FDTD) method is constrained by the Courant-Friedrichs-Lewy (CFL) condition [1], which affects its computational efficiency for electrically fine and high Q structures.
The modelling with ANSYS using explicit time integration is limited by the CFL (Courant-Friedrichs-Lewy) condition [8].