Electrowetting-Controlled Dropwise Condensation with Patterned Electrodes: Physical Principles, Modeling, and Application Perspectives

Hoek, H. et al (2020) Electrowetting-Controlled Dropwise Condensation with Patterned Electrodes: Physical Principles, Modeling, and Application Perspectives. Advanced Materials Interfaces, 8 (2). ISSN 21967350

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Abstract

Patterning the wettability of solid surfaces is a successful strategy to control the dropwise condensation of vapor onto partially wetting solid surfaces. The condensation of water vapor onto electrowetting-functionalized surfaces is studied with structured co-planar electrodes. A detailed analysis of the experimental distribution of millions of drops reveals that despite the presence of contact angle hysteresis and the occurrence of random drop coalescence events, the preferential drop positions closely follow the numerically calculated local minima of the electrostatic energy for variable drop size. Even subtle transitions between competing preferred locations are properly reproduced by the model. Based on this quantitative understanding of the condensation patterns, a series of important follow-up steps that need to be taken to demonstrate a reliable performance gain in various applications focusing in particular on enhanced heat transfer is discussed. © 2020 The Authors. Advanced Materials Interfaces published by Wiley-VCH GmbH

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IITH Creators:
IITH CreatorsORCiD
Dey, Ranabirhttps://orcid.org/0000-0002-0514-7357
Item Type: Article
Uncontrolled Keywords: dropwise condensation, electrowetting, fog harvesting, heat transfer, wetting
Subjects: Physics > Mechanical and aerospace
Divisions: Department of Mechanical & Aerospace Engineering
Depositing User: Mrs Haseena VKKM
Date Deposited: 24 Jan 2022 10:17
Last Modified: 01 Mar 2022 06:52
URI: http://raiith.iith.ac.in/id/eprint/9120
Publisher URL: https://onlinelibrary.wiley.com/doi/10.1002/admi.2...
OA policy: https://v2.sherpa.ac.uk/id/publication/27219
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