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Can a Dynamic Contact Angle be Understood in Terms of a Friction Coefficient?

Hamraoui, Ahmed; Thuresson, Krister; Nylander, T; Yaminsky, Vassili


The kinetics of capillary rise of pure water and ethanol as well as mixtures thereof that under static conditions wet glass capillaries has been studied by a high-speed imaging technique. To adequately describe the experimental data, a rate-dependent dynamic contact angle must be added to the Washburn-Lucas equation. This result is discussed in terms of a molecular friction coefficient at the front of the liquid flowing over the substrate. Dynamic inertia effects are significant at the initial...[Show more]

CollectionsANU Research Publications
Date published: 2000
Type: Journal article
Source: Journal of Colloid and Interface Science
DOI: 10.1006/jcis.2000.6830


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