Experimental study of the dynamic characteristics of an oblique impact of a water droplet

YAO Yina; LI Cong; TAO Zhenxiang; YANG Rui

doi:10.16511/j.cnki.qhdxxb.2018.25.048

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Journal of Tsinghua University(Science and Technology) ›› 2019, Vol. 59 ›› Issue (2) : 129-134. DOI: 10.16511/j.cnki.qhdxxb.2018.25.048

PHYSICS AND ENGINEERING MECHANICS

Experimental study of the dynamic characteristics of an oblique impact of a water droplet

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Abstract

The impact of water droplets on a smooth stainless-steel surface was studied experimentally for various velocities and angles. The experiments studied the effects of impact angle and Weber number on the dynamic characteristics of the impact process, such as the displacement of leading and trailing edges, the maximum spread diameter and gliding length. The results showed that the maximum spread diameter increased with increasing Weber number, but decreased with increasing surface slope. However, once the water droplet reached equilibrium, the droplet contact diameter was found to be independent of the impact angle and the Weber number but mainly depended on the advancing and receding contact angles of the droplet on the surface. In addition, increasing both the impact angle and the Weber number increased the gliding length.

Key words

droplet / impact / oblique / dynamic characteristics

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YAO Yina, LI Cong, TAO Zhenxiang, YANG Rui. Experimental study of the dynamic characteristics of an oblique impact of a water droplet[J]. Journal of Tsinghua University(Science and Technology). 2019, 59(2): 129-134 https://doi.org/10.16511/j.cnki.qhdxxb.2018.25.048

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