Fig. 2From: A novel high accuracy finite-difference time-domain methodDependence of the phase velocity errors on wavenumber in two dimensions: a Sekido23 with \(C=0.5\); b scheme 1 with \(C=0.5\); c scheme 2 with \(C=0.5\); d Sekido23 with \(C=1\); e scheme 1 with \(C=1\); f scheme 2 with \(C=1\)Back to article page