Dynamic Behavior of a Drop on a Vertically Oscillating Surface - Selected Topics of Computational and Experimental Fluid Mechanics - page 468

Fig. 8 Height of the highest peak as a function of time for a 60 µ l drop of water to a frequency of
48Hz

Fig. 9 Atomization of a drop of water of 60 µ lat a 56Hz b 75Hz

The nonlinearity of the phenomenon is clearly observedwhen the frequency is further
increased. The drop becomes stable again, and enters a geometric phase. If the change
of frequency is not continuous, the atomization phase does not appear, and the drop
goes from chaotic to geometric again. If the frequency is increased once again, a new
chaotic phase is attained.
In Fig. 10 , it can be observed that if the frequency is changed from 24 to 55Hz,
the heights increase in each phase and from one phase to the next. Just before each
phase transition, the height is slightly lowered, probably due to the fact that most of
the energy is used in the transition.