Journal
BIOMICROFLUIDICS
Volume 5, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3567099
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Funding
- Engineering and Physical Sciences Research Council (U.K.)
- EPSRC-GB [EP/F065019/1]
- FFEI, Ltd
- Innovation in Industrial Inkjet Technology [EP/H018913/1]
- EPSRC [EP/F065019/1, EP/H018913/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F065019/1, EP/H018913/1] Funding Source: researchfish
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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. c 2011 American Institute of Physics. [doi: 10.1063/1.3567099]
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