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In-situ icing and water condensation study on different topographical surfaces

Memon, Halar; Liu, Junpeng; Weston, Nicola; Wang, Jie; De Focatiis, Davide; Choi, Kwing-so; Hou, Xianghui


Halar Memon

Junpeng Liu

Nicola Weston

Jie Wang

Professor of Fluid Mechanics

Xianghui Hou


Icephobicity is intrinsically affected by rough asperities and the surface voids provide anchoring points for the ice. The anchor of ice is likely to form on the surface under high humidity conditions. In-situ water condensation and icing observation were conducted to understand water condensation and ice retracting patterns in controlled humidity, pressure and temperature conditions. It was observed that water micro-condensation and icing occurred on rougher surfaces and the water droplets condensed along the surface cracks of the superhydrophobic polydimethylsiloxane (PDMS) based nanocomposite coatings. Further analysis revealed that ice anchoring was present on both aluminum and superhydrophobic coating surface, but it was more severe and intensified on the as-received aluminum substrates. No water condensation or subsequent icing was found on smooth PDMS hydrophobic surfaces due to the incapacity of the smooth surfaces to anchor water drops. It is the first time to validate ice anchoring over retracting ice on different wettability surfaces from in-situ icing observation. Ice adhesion strengths were also measured on the studied surfaces and the results indicated a strong linkage between centrifugal shearing of ice and anchoring mechanism due to surface rough voids, and there was no clear relevancy between ice adhesion strength and the surface wettability or hydrophobicity.


Memon, H., Liu, J., Weston, N., Wang, J., De Focatiis, D., Choi, K., & Hou, X. (2019). In-situ icing and water condensation study on different topographical surfaces. Cold Regions Science and Technology, 165,

Journal Article Type Article
Acceptance Date Jun 7, 2019
Online Publication Date Jun 10, 2019
Publication Date Sep 1, 2019
Deposit Date Jun 18, 2019
Publicly Available Date Dec 11, 2020
Journal Cold Regions Science and Technology
Print ISSN 0165-232X
Electronic ISSN 1872-7441
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 165
Article Number 102814
Keywords Icephobicity; Superhydrophobicity; Ice anchoring; In-situ icing
Public URL
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