Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/145698
Title: Reduced contact time of a droplet impacting on a moving superhydrophobic surface
Authors: Zhang, Xuan
Zhu, Zhibing
Zhang, Chaoyang
Yang, Chun
Keywords: Engineering::Mechanical engineering
Issue Date: 2020
Source: Zhang, X., Zhu, Z., Zhang, C., & Yang, C. (2020). Reduced contact time of a droplet impacting on a moving superhydrophobic surface. Applied Physics Letters, 117(15), 151602-. doi:10.1063/5.0023896
Project: MOE2016-T2-1-114
Journal: Applied Physics Letters
Abstract: While the droplet impact dynamics on stationary superhydrophobic surfaces has been extensively studied, the dynamic behaviors of impact droplets on moving superhydrophobic surfaces have received less attention. Here, we report the droplet impact dynamics on a moving superhydrophobic surface. We show that compared to the stationary surface, the moving superhydrophobic surface breaks the symmetry in both droplet spreading and retracting. Specifically, the shear force exerted by the moving surface acting on the impact droplet enlarges the maximum spreading in the moving direction, and thus, the droplet contact time is reduced. The contact time of impact droplets was examined thoroughly under the effects of the droplet impact (normal) and the wall moving (tangential) Weber numbers. We provide a scaling analysis to explain how the contact time depends on the normal and tangential Weber numbers. Our experimental investigation and theoretical analysis provide insight into the droplet impact dynamics on moving superhydrophobic surfaces.
URI: https://hdl.handle.net/10356/145698
ISSN: 0003-6951
DOI: 10.1063/5.0023896
Rights: © 2020 The Author(s). All rights reserved. This paper was published by AIP in Applied Physics Letters and is made available with permission of The Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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