The dynamics of the impact and coalescence of droplets on a solid surface

Castrejon-Pita, J. R., Betton, E. S., Kubiak, Krzysztof, Wilson, M. C. T. and Hutchings, I. M. (2011) The dynamics of the impact and coalescence of droplets on a solid surface. Biomicrofluidics, 5 (1). 014112. ISSN 1932-1058

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Abstract

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.

Item Type:	Article
Additional Information:	This work was supported by the Engineering and Physical Sciences Research Council U.K. and industrial partners in the Innovation in Industrial Inkjet Technology Project No. EP/H018913/1 and by EPSRC-GB Grant No. EP/F065019/1. E.S.B. wishes to acknowledge support from FFEI, Ltd.
Uncontrolled Keywords:	air; drops; flow visualisation; image processing; laser velocimetry; water
Subjects:	T Technology > TJ Mechanical engineering and machinery
Schools:	School of Computing and Engineering
Depositing User:	Krzysztof Kubiak
Date Deposited:	18 Sep 2014 15:15
Last Modified:	04 Dec 2016 12:41
URI:	http://eprints.hud.ac.uk/id/eprint/21583

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