(a) Schematic of the evaporation process at the thin-film, as adapted from Thome et al.[32], (b) Image of liquid plug ((L/D)i =6.7), under non-heated condition at room
temperature, and, (c) Since the liquid thin-film is very thin (in order of micro-meter), visualizing it with high speed camera is not possible. Hence the same flow condition is
replicated under confocal microscopy to clearly show the existence of liquid thin-film during motion