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

Hoek, Harmen and Dey, Ranabir and Mugele, Frieder (2021) Electrowetting‐Controlled Dropwise Condensation with Patterned Electrodes: Physical Principles, Modeling, and Application Perspectives. Advanced Materials Interfaces, 8 (2). pp. 1-10. ISSN 2196-7350

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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 Creators	ORCiD
Dey, Ranabir	UNSPECIFIED

Item Type:

Article

Additional Information:

The authors thank D. Wijnperlé for sample preparation in the cleanroom and Dr. Baratian for his contributions in earlier phases of the experiment. The authors acknowledge financial support by the Dutch Organization for Scientific Research (NWO) within the VICI program (Grant No. 11380).

Uncontrolled Keywords:

dropwise condensation; electrowetting; fog harvesting; heat transfer; wetting

Subjects:

Physics > Mechanical and aerospace

Divisions:

Department of Mechanical & Aerospace Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

19 Aug 2022 05:28

Last Modified:

19 Aug 2022 05:28