Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/85162
Title: Growth and wetting of water droplet condensed between micron-sized particles and substrate
Authors: Quang, Tran Si Bui
Leong, Fong Yew
An, Hongjie
Tan, Beng Hau
Ohl, Claus-Dieter
Keywords: Water Droplet Condensation
DRNTU::Science::Physics
Wetting State
Issue Date: 2016
Source: Quang, T. S. B., Leong, F. Y., An, H., Tan, B. H., & Ohl, C.-D. (2016). Growth and wetting of water droplet condensed between micron-sized particles and substrate. Scientific Reports, 6, 30989-. doi:10.1038/srep30989
Series/Report no.: Scientific Reports
Abstract: We study heterogeneous condensation growth of water droplets on micron-sized particles resting on a level substrate. Through numerical simulations on equilibrium droplet profiles, we find multiple wetting states towards complete wetting of the particle. Specifically, a partially wetting droplet could undergo a spontaneous transition to complete wetting during condensation growth, for contact angles above a threshold minimum. In addition, we find a competitive wetting behavior between the particle and the substrate, and interestingly, a reversal of the wetting dependence on contact angles during late stages of droplet growth. Using quasi-steady assumption, we simulate a growing droplet under a constant condensation flux, and the results are in good agreement with our experimental observations. As a geometric approximation for particle clusters, we propose and validate a pancake model, and with it, show that a particle cluster has greater wetting tendency compared to a single particle. Together, our results indicate a strong interplay between contact angle, capillarity and geometry during condensation growth.
URI: https://hdl.handle.net/10356/85162
http://hdl.handle.net/10220/46673
DOI: 10.1038/srep30989
Rights: © 2016 The Authors (Nature Publishing Group). This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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