Influence of fluid flow on the stability and wetting transition of   submerged superhydrophobic surfaces

doi:10.1039/c6sm00302h

CORC > 北京大学 > 工学院

	Influence of fluid flow on the stability and wetting transition of submerged superhydrophobic surfaces
	Xiang, Yaolei ; Xue, Yahui ; Lv, Pengyu ; Li, Dandan ; Duan, Huiling
刊名	SOFT MATTER
	2016
关键词	SLIP
DOI	10.1039/c6sm00302h
英文摘要	Superhydrophobic surfaces have attracted great attention for drag reduction application. However, these surfaces are subject to instabilities, especially under fluid flow. In this work, we in situ examine the stability and wetting transition of underwater superhydrophobicity under laminar flow conditions by confocal microscopy. The absolute liquid pressure in the flow channel is regulated to acquire the pinned Cassie-Baxter and depinned metastable states. The subsequent dynamic evolution of the meniscus morphology in the two states under shear flow is monitored. It is revealed that fluid flow does not affect the pressure-mediated equilibrium states but accelerates the air exchange between entrapped air cavities and bulk water. A diffusion-based model with varying effective diffusion lengths is used to interpret the experimental data, which show a good agreement. The Sherwood number representing the convection-enhanced mass transfer coefficient is extracted from the data, and is found to follow a classic 1/3-power-law relation with the Reynolds number as has been discovered in channel flows with diffusive boundary conditions. The current work paves the way for designing durable superhydrophobic surfaces under flow conditions.; National Natural Science Foundation of China (NSFC) [11225208, 11521202]; SCI(E); EI; PubMed; ARTICLE; hlduan@pku.edu.cn; 18; 4241-4246; 12
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/434152]
专题	工学院
推荐引用方式 GB/T 7714	Xiang, Yaolei,Xue, Yahui,Lv, Pengyu,et al. Influence of fluid flow on the stability and wetting transition of submerged superhydrophobic surfaces[J]. SOFT MATTER,2016.
APA	Xiang, Yaolei,Xue, Yahui,Lv, Pengyu,Li, Dandan,&Duan, Huiling.(2016).Influence of fluid flow on the stability and wetting transition of submerged superhydrophobic surfaces.SOFT MATTER.
MLA	Xiang, Yaolei,et al."Influence of fluid flow on the stability and wetting transition of submerged superhydrophobic surfaces".SOFT MATTER (2016).