Figure 5
From: Kinematics of the viscous filament during the droplet breakup in air

Distribution of \(\zeta\)-coefficient in the droplet and in its vicinity: TR-regime (a), VR (linear)-regime (b), post pinch-off (c). It is important to remark that vorticity dominant regions (\(\zeta\) < 0) inside the droplet are almost absent in the VR regime (b), where extension is dominant (especially in the filament).