Morphological bubble evolution induced by air diffusion on submerged   hydrophobic structures

doi:10.1063/1.4977052

CORC > 北京大学 > 工学院

	Morphological bubble evolution induced by air diffusion on submerged hydrophobic structures
	Lv, Pengyu ; Xiang, Yaolei ; Xue, Yahui ; Lin, Hao ; Duan, Huiling
刊名	PHYSICS OF FLUIDS
	2017
关键词	SUPERHYDROPHOBIC SURFACES WATER-INTERFACE ADSORPTIVE BEHAVIOR RHODAMINE 6G ADHESION GROWTH NANODROPLETS NANOBUBBLES MOLECULES SLIPPAGE
DOI	10.1063/1.4977052
英文摘要	Bubbles trapped in the cavities always play important roles in the underwater applications of structured hydrophobic surfaces. Air exchange between bubbles and surrounding water has a significant influence on the morphological bubble evolution, which in turn frequently affects the functionalities of the surfaces, such as superhydrophobicity and drag reduction. In this paper, air diffusion induced bubble evolution on submerged hydrophobic micropores under reduced pressures is investigated experimentally and theoretically. The morphological behaviors of collective and single bubbles are observed using confocal microscopy. Four representative evolution phases of bubbles are captured in situ. After depressurization, bubbles will not only grow and coalesce but also shrink and split although the applied pressure remains negative. A diffusion-based model is used to analyze the evolution behavior and the results are consistent with the experimental data. A criterion for bubble growth and shrinkage is also derived along with a phase diagram, revealing that the competition of effective gas partial pressures across the two sides of the diffusion layer dominates the bubble evolution process. Strategies for controlling the bubble evolution behavior are also proposed based on the phase diagram. The current work provides a further understanding of the general behavior of bubble evolution induced by air diffusion and can be employed to better designs of functional microstructured hydrophobic surfaces. Published by AIP Publishing.; National Natural Science Foundation of China (NSFC) [11521202, 11632001]; SCI(E); ARTICLE; 3; 29
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/474884]
专题	工学院
推荐引用方式 GB/T 7714	Lv, Pengyu,Xiang, Yaolei,Xue, Yahui,et al. Morphological bubble evolution induced by air diffusion on submerged hydrophobic structures[J]. PHYSICS OF FLUIDS,2017.
APA	Lv, Pengyu,Xiang, Yaolei,Xue, Yahui,Lin, Hao,&Duan, Huiling.(2017).Morphological bubble evolution induced by air diffusion on submerged hydrophobic structures.PHYSICS OF FLUIDS.
MLA	Lv, Pengyu,et al."Morphological bubble evolution induced by air diffusion on submerged hydrophobic structures".PHYSICS OF FLUIDS (2017).