渗透(战争)
润湿
材料科学
静水压力
毛细管作用
毛细管压力
流体静力平衡
穿透深度
超亲水性
机械
复合材料
光学
多孔介质
多孔性
物理
工程类
量子力学
运筹学
作者
Yang Zong,Alexander Oron,Haihu Liu,Youhua Jiang
出处
期刊:Langmuir
[American Chemical Society]
日期:2023-07-07
卷期号:39 (28): 9808-9815
被引量:4
标识
DOI:10.1021/acs.langmuir.3c00953
摘要
We investigate experimentally the effects of pore size, surface wettability, and penetration mode on the characteristics of liquid penetration through meshes. Utilizing the impact of droplets and the hydrostatic pressure, we study water penetration through superhydrophobic, hydrophobic, superhydrophilic, and hydrophilic meshes with different uniform radii and pitch values of the pores. In the case of dynamic penetration enabled by the droplet impact, our results show that surface wettability has a negligible effect on either the threshold speed of the droplet penetration or the penetrating liquid mass. The threshold droplet speed is found to be mainly determined by the synergistic effects of global and local dynamic pressures of the impacting droplet, and a modified expression for the threshold droplet speed is proposed. For the quasi-static penetration based on the applied hydrostatic pressure, we find that surface wettability and pore pitch do not affect the penetration threshold pressure but do affect the pressure at which the liquid penetration ceases. This is due to the fact that under quasi-static conditions, the droplet liquid spreads out and merges with that at the adjacent pores on the mesh underside, affecting the wetted area and, hence, the capillary pressure resisting penetration.
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