Rough capillary rise

Panter, Jack R. ORCID:, Konicek, Andrew R., King, Mark A., Jusufi, Arben, Yeganeh, Mohsen S. and Kusumaatmaja, Halim (2023) Rough capillary rise. Communications Physics, 6. ISSN 2399-3650

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Capillary rise within rough structures is a wetting phenomenon that is fundamental to survival in biological organisms, deterioration of our built environment, and performance of numerous innovations, from 3D microfluidics to carbon capture. Here, to accurately predict rough capillary rise, we must couple two wetting phenomena: capillary rise and hemiwicking. Experiments, simulations, and theory demonstrate how this coupling challenges our conventional understanding and intuitions of wetting and roughness. Firstly, the critical contact angle for hemiwicking becomes separation-dependent so that hemiwicking can vanish for even highly wetting liquids. Secondly, the rise heights for perfectly wetting liquids can differ between smooth and rough systems, even with the same 0∘ contact angle. Finally, the raised liquid volumes are substantially increased in rough compared to smooth systems. To explain and predict all rise heights and volumes with quantitative accuracy, we present the Dual-Rise model that is valid for general roughness, liquids, and surface wettabilities.

Item Type: Article
Additional Information: Funding Information: H.K. and J.R.P. would like to thank EPSRC for funding (grant no. EP/V034154/1).
Uncontrolled Keywords: physics and astronomy(all) ,/dk/atira/pure/subjectarea/asjc/3100
Faculty \ School: Faculty of Science > School of Engineering
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Depositing User: LivePure Connector
Date Deposited: 22 May 2023 09:33
Last Modified: 31 May 2023 11:30
DOI: 10.1038/s42005-023-01160-w


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