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Evaporation of ethanol/water mixture droplets on micro-patterned PDMS surfaces
Yu YS1; Huang XF(黄先富)2; Sun L1; Zhou JZ1; Zhou A1
Source PublicationInternational Journal of Heat and Mass Transfer
2019
Volume144Pages:118708
ISSN0017-9310
Abstract

We report evaporation of ethanol/water mixture droplets on both pillar-arrayed and micro-holed poly-dimethylsiloxane (PDMS) surfaces. Analysis of wettability shows that (i) when the pillar-to-pillar spacing is 5 mu m, the pillar-arrayed PDMS surfaces are Cassie-Baxter-wetted; (ii) when the pillar-to-pillar spacing is 20 or 50 mu m, part of each pillar-arrayed surface is Cassie-Baxter-wetted while the other part Wenzel-wetted; (iii) all micro-holed PDMS surfaces are Cassie-Baxter-wetted; (iv) the advancing and receding contact angles increase with the increase of the pillar-to-pillar spacing, while they decrease with the increase of the hole-to-hole spacing. The investigation on evaporation of mixture droplets demonstrates that (i) evaporation on pillar-arrayed PDMS first proceeds with constant contact radius mode (CCR) due to the strong adhesion between the surface and the droplet; (ii) on micro-holed surfaces CCR stage is also observed for the surface with the hole-to-hole spacing of 5 mu m, while it is not found at high ethanol concentration for surfaces with the hole-to-hole spacings of 20 mu m and 50 mu m, which is attributed to the weak adhesion between the micro-holed surfaces and the droplet. Finally, the evolution of droplet volume and its two-third power are discussed. (C) 2019 Elsevier Ltd. All rights reserved.

DOI10.1016/j.ijheatmasstransfer.2019.118708
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000494883300096
Classification一类
Ranking2
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79557
Collection非线性力学国家重点实验室
Affiliation1.Department of Mechanics, School of Civil Engineering, Architecture and Environment, Hubei University of Technology
2.State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Yu YS,Huang XF,Sun L,et al. Evaporation of ethanol/water mixture droplets on micro-patterned PDMS surfaces[J]. International Journal of Heat and Mass Transfer,2019,144:118708.
APA Yu YS,Huang XF,Sun L,Zhou JZ,&Zhou A.(2019).Evaporation of ethanol/water mixture droplets on micro-patterned PDMS surfaces.International Journal of Heat and Mass Transfer,144,118708.
MLA Yu YS,et al."Evaporation of ethanol/water mixture droplets on micro-patterned PDMS surfaces".International Journal of Heat and Mass Transfer 144(2019):118708.
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