Influence of Liquid Viscosity on Droplet Impingement on Superhydrophobic Surfaces

Details Influence of Liquid Viscosity on Droplet Impingement on Superhydrophobic Surfaces Influence of Liquid Viscosity on Droplet Impingement on Superhydrophobic Surfaces

2010-10-15

arxiv.org/abs/1010.3240v1

Physics

Fluid Dynamics

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Scientific paper

This fluid dynamics video describes droplet impingement experiments performed on superhydrophobic surfaces. When droplets of pure water are impinged upon superhydrophobic surfaces, a region of thin coherent jets are observed for Weber numbers between 5 and 15. Also, peripheral splashing is observed for Weber numbers above about 200. When the viscosity of the droplet is increased by mixing glycerol with the water, the thin jets are not observed and peripheral splashing is delayed somewhat. In the Weber number range where pure water droplets are observed to splash peripherally, the water/glycerol droplets are observed to have two-pronged jets.

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