A simple experimental setup to study the impact and coalescence of deposited droplets is described. Droplet impact and coalescence have been investigated by high-speed particle image velocimetry. Velocity fields near the liquid-substrate interface have been observed for the impact and coalescence of 2.4 mm diameter droplets of glycerol/water striking a flat transparent substrate in air. The experimental arrangement images the internal flow in the droplets from below the substrate with a high-speed camera and continuous laser illumination. Experimental results are in the form of digital images that are processed by particle image velocimetry and image processing algorithms to obtain velocity fields, droplet geometries, and contact line positions. Experimental results are compared with numerical simulations by the lattice Boltzmann method.
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March 2011
Research Article|
March 29 2011
The dynamics of the impact and coalescence of droplets on a solid surface Available to Purchase
Biomicrofluidics 5, 014112 (2011)
Article history
Received:
December 07 2010
Accepted:
February 11 2011
Citation
J. R. Castrejón-PitaE. S. BettonK. J. KubiakM. C. T. WilsonI. M. Hutchings; The dynamics of the impact and coalescence of droplets on a solid surface. Biomicrofluidics 1 March 2011; 5 (1): 014112. https://doi.org/10.1063/1.3567099
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