Fig. 1.
(A) Schematic of the experimental setup: A drop with radius is deposited on a liquid-nitrogen bath. To avoid ebullition of the central bath, it is placed in a styrofoam box and maintained at the center of a sacrificial bath for which evaporation maintains a nitrogen atmosphere in the box. Drop trajectory and velocity are recorded from the top. (B) Chronophotography of the successive positions (separated by 80 ms) of an ethanol drop ( = 1.5 mm) seeded with particles. The white arrow indicates the initial position and movement of ethanol. (C) Trajectory of the center of mass of the same drop in the x–y plane in a longer time interval. The color indicates the drop velocity, varying from (dark blue) to cm/s (dark red).