Figure 4
From: Velocimetry of superconducting vortices based on stroboscopic resonances

Vortex velocities.
(a–d) Spatial distribution of the vortex velocity along the pinning channel during first four resonances. The black points show the instantaneous vortex velocities, directly measured in the simulations. Average vortex velocity (red line) compares well to the W/τcross (green line).