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Frosting characteristics on hydrophobic and superhydrophobic surfaces: A review

Title
Frosting characteristics on hydrophobic and superhydrophobic surfaces: A review
Author
김동립
Keywords
Hydrophobic; Superhydrophobic; Frost
Issue Date
2017-04
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ENERGY CONVERSION AND MANAGEMENT, v. 138, page. 1-11
Abstract
Fabrication methods of the hydrophobic property on metal surfaces and frosting characteristics on hydrophobic surfaces were investigated. A hydrophobic surface with a static contact angle of less than 150 was implemented by surface coating or etching, and a superhydrophobic surface with a static contact angle of greater than 150 was realized by a hybrid method using both coating and etching. The changes in surface properties affected the behaviors of the early stage frosting from the dry surface to the formation of ice crystals. On the hydrophobic surfaces, ice crystals were formed by freezing after condensation. Isolated-droplet freezing and inter-droplet freezing are mechanisms by which the condensate undergoes a phase change into ice crystals. Through isolated-droplet freezing, a Supercooled condensate changes phase into ice crystals by forming ice nuclei based on the classical nucleation theory. In addition, through inter-droplet freezing, ice crystals are propagated due to the difference in saturation vapor pressure between supercooled condensates and ice crystals. The formation and propagation of ice crystals are delayed as the static contact angle increases. Additionally, based on a review, future researches that is needed to improve hydrophobic technologies are discussed. (C) 2017 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0196890417300833?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/113694
ISSN
0196-8904; 1879-2227
DOI
10.1016/j.enconman.2017.01.067
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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