A Water Droplet Pinning and Heat Transfer Characteristics on an Inclined Hydrophobic Surface

A water droplet pinning on inclined hydrophobic surface is considered and the droplet heat transfer characteristics are examined. Solution crystallization of polycarbonate is carried out to create hydrophobic characteristics on the surface. The pinning state of the water droplet on the extreme incli...

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Bibliographic Details
Published in:Scientific reports 2018-02, Vol.8 (1), p.3061-20, Article 3061
Main Authors: Al-Sharafi, Abdullah, Yilbas, Bekir Sami, Ali, Haider, AlAqeeli, N.
Format: Article
Language:English
Subjects:
639/166
639/4077/909
Conduction
Convection
Crystallization
Fog
Heat transfer
Humanities and Social Sciences
Hydrophobic surfaces
Hydrophobicity
multidisciplinary
Polycarbonate
Science
Science (multidisciplinary)
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Summary:A water droplet pinning on inclined hydrophobic surface is considered and the droplet heat transfer characteristics are examined. Solution crystallization of polycarbonate is carried out to create hydrophobic characteristics on the surface. The pinning state of the water droplet on the extreme inclined hydrophobic surface (0° ≤ δ ≤ 180°, δ being the inclination angle) is assessed. Heat transfer from inclined hydrophobic surface to droplet is simulated for various droplet volumes and inclination angles in line with the experimental conditions. The findings revealed that the hydrophobic surface give rise to large amount of air being trapped within texture, which generates Magdeburg like forces between the droplet meniscus and the textured surface while contributing to droplet pinning at extreme inclination angles. Two counter rotating cells are developed for inclination angle in the range of 0° 
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-21511-w