FIG. 4.
(a) Schematic illustration of the liquid element in the siphoning channel at the end of the liquid-evacuation process. The air/liquid interface near the exit of the outlet was balanced by the centrifugally induced pressure (ΔPc) and the surface tension induced pressure (ΔPs). (b) The measured critical rotational speed from the experimental data for various hydraulic diameters of the siphoning channel.
