Wang, W.; Yu, W.; Yu, Z.; Chen, S.; Cao, D.; Liu, X.; Zhao, J. Non-Axisymmetric Bouncing Dynamics on a Moving Superhydrophobic Surface. Symmetry2024, 16, 29.
Wang, W.; Yu, W.; Yu, Z.; Chen, S.; Cao, D.; Liu, X.; Zhao, J. Non-Axisymmetric Bouncing Dynamics on a Moving Superhydrophobic Surface. Symmetry 2024, 16, 29.
Wang, W.; Yu, W.; Yu, Z.; Chen, S.; Cao, D.; Liu, X.; Zhao, J. Non-Axisymmetric Bouncing Dynamics on a Moving Superhydrophobic Surface. Symmetry2024, 16, 29.
Wang, W.; Yu, W.; Yu, Z.; Chen, S.; Cao, D.; Liu, X.; Zhao, J. Non-Axisymmetric Bouncing Dynamics on a Moving Superhydrophobic Surface. Symmetry 2024, 16, 29.
Abstract
The phenomenon of droplet impact on moving surfaces is widely observed in fields such as transportation, rotating machinery, and inkjet printing. Droplets exhibit non-axisymmetric behavior due to the motion of solid surfaces which significantly determines core parameters such as contact time, maximum spreading radius, and bounding velocity, thereby affecting the efficiency of related applications. In this study, we focus on kinetics and morphology of the non-axisymmetric bouncing behaviors for droplets impacting on a moving superhydrophobic surface (SHPS) within the normal (Wen) and tangential (Wet) Weber numbers. Considering the influences of moving surface on the contact area and contact time, the previous scaling formula for the horizontal velocity of droplets has been improved. Based on the velocity superposition hypothesis, we establish a theoretical model for the ratio of the maximum spreading radius at both ends depending on Wen and Wet. This research provides both experimental and theoretical evidence for understanding and controlling the non-axisymmetric behavior of droplets impacting on moving surfaces.
Keywords
superhydrophobic substrate; droplet impact; spreading dynamics; contact time
Subject
Physical Sciences, Fluids and Plasmas Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
