Successive snapshots of interference fringes (accentuated by black arcs) made by a bouncing droplet. The snapshots are separated by 8 ms. The number of observed fringes is directly related to the film thickness which oscillates in between 100 nm and . An increasing number of fringes are visible when the droplet lands and squeezes the air film (until snapshot 3); then this number decreases as the droplet takes off.
Cumulative distribution of the normalized lifetime of bouncing droplets ( , ) at various forcing accelerations: (i) (●) and (ii) (▲). The lines represent fitted Gaussian distributions.
Lifetime of bouncing droplets as a function of the normalized acceleration for various droplet viscosities. (●) , (◼) , and (▲) . Solutions of the model are represented by dashed curves. The frequency corresponds to a value of equal to 9.7.
Lifetime of bouncing droplets as a function of the normalized acceleration for and various forcing frequencies. (●) , , (◼) , , and (▲) , . Solutions of the model are represented by dashed curves.
Successive snapshots of the interference fringes (accentuated by black arcs) taken when the air film thickness is minimal for a droplet bouncing at , , and . The number of fringes decreases with time, indicating a progressive decrease in the average film thickness. The number of bounce from the start is indicated in brackets on each snapshot.
Normalized lifetime as a function of , according to Eq. (9) . (Inset) Variation of with the forcing frequency .
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