润湿
机械
材料科学
体积热力学
曲面(拓扑)
流体体积法
固体表面
韦伯数
复合材料
化学
化学物理
热力学
几何学
流量(数学)
物理
雷诺数
湍流
数学
作者
Abba Abdulhamid Abubakar,Bekir Sami Yilbas,M. Hussain A-Qahtani,Ghassan Hassan,Mubarak Yakubu,Saeed Bahatab,John A. E. Adukwu
出处
期刊:Journal of Fluids Engineering-transactions of The Asme
[ASME International]
日期:2021-06-01
卷期号:143 (6)
被引量:4
摘要
Abstract Impacting droplet on a hydrophobic surface is investigated and droplet size effect on impacting properties is examined. Liquid pressure variation inside droplet is numerically simulated in the impacting and rebounding periods. Droplet motion on impacted hydrophobic surface is monitored using a high-speed recording system. We showed that predictions and high-speed data for droplet shape and geometric features appear to be almost identical in the spreading and retraction of the droplet on sample surface. Increased volume of droplet gives rise to the peak pressure enhancement in droplet liquid during impact. The maximum droplet height remains larger for large volume droplets in both spreading and retraction cycles. Increasing size of droplet enlarges the wetting diameter on the impacted surface during droplet deformation on sample surfaces. The rate of peak velocity of the spreading surface of the droplet is faster for larger droplets as compared to that corresponding to small droplets. The ratio of spreading period over the retraction period of the droplet becomes small for droplets with small size.
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