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

Influence of Liquid Viscosity on Droplet Impingement on Superhydrophobic Surfaces