Vibration of submillimeter-size supported droplets

Vibration of submillimeter-size supported droplets

We study the fundamental vibration mode of supported submillimeter-size droplets. Using an analogy with a simple oscillator we derive a semianalytical expression for the eigenfrequency and the scaling law of the energy dissipation within the droplet. The experimental results obtained for mercury dro...

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Veröffentlicht in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2006-04, Vol.73 (4 Pt 1), p.041602-041602, Article 041602
Hauptverfasser: Celestini, Franck, Kofman, Richard
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container_title Physical review. E, Statistical, nonlinear, and soft matter physics
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creator Celestini, Franck
Kofman, Richard
description We study the fundamental vibration mode of supported submillimeter-size droplets. Using an analogy with a simple oscillator we derive a semianalytical expression for the eigenfrequency and the scaling law of the energy dissipation within the droplet. The experimental results obtained for mercury drops deposited on glass are compared with the model. The agreement is satisfactory for the eigenfrequencies on the whole range of size we considered (from 0.04 to 0.9 mm). The scaling law for the dissipation is recovered for radii larger than 0.1 mm but fails for smaller droplets. We finally discuss possible applications related to the use of vibrations to effectively reduce the hysteresis of the wetting angle and therefore increase the mobility of the supported droplets.
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subjects Condensed Matter
Other
Physics
title Vibration of submillimeter-size supported droplets
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