Experimental Study of Viscous Droplet Impacting on Horizontal Moving Films

Abstract:

The phenomena and behaviors of single droplet impacting on horizontal moving film have been studied by visual experiments, and the effects of viscosity and weber number (We) on the droplet impacting are analyzed. The experimental liquid is glycerol-water mixture with the volume fraction of glycerol 50%, 40%, 30%, and 10% respectively. We vary among 200 and 500. The results indicate that a higher viscosity plays an important role in hindering to droplet splashing, and the critical viscosity of splash increases with the increasing We. When We<242, the viscosity does not play a significant role to the height of the crown and the mid-jet. But when We>320, the jet height increases with the increasing We. The crown height of low viscosity liquid impacting significantly exceeds that of the high viscosity.

• Periodical: Applied Mechanics and Materials (Volume 574)
• Pages: 298-302
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.574.298
• Online since: July 2014
• Authors: Guo Jun Fan*, Zhao Miao Liu, Feng Shen
• Keywords: Droplet Impacting, Glycerol, Surface Tension, Viscosity, Weber Number

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