Controlling the partial coalescence of a droplet on a vertically vibrated bath

Details Controlling the partial coalescence of a droplet on a vertically vibrated bath Controlling the partial coalescence of a droplet on a vertically vibrated bath

2007-02-27

arxiv.org/abs/physics/0702235v2

Phys. Rev. E 76, 035302(R) (2007)

Physics

Fluid Dynamics

4 pages, 3 figures, accepted in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.76.035302

A new method is proposed to stop the cascade of partial coalescences of a droplet laid on a liquid bath. The strategy consists in vibrating the bath in the vertical direction in order to keep small droplets bouncing. Since large droplets are not able to bounce, they partially coalesce until they reach a critical size. The system behaves as a low pass filter : droplets smaller than the critical size are selected. This size has been investigated as a function of the acceleration and the frequency of the bath vibration. Results suggest that the limit size for bouncing is related to the first mode of the droplet deformation.

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