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Dissipation in rapid dynamic wetting
KTH.
2011 (English)In: Journal of Fluid Mechanics, ISSN 0022-1120, E-ISSN 1469-7645, Vol. 682, p. 213-240Article in journal (Refereed) Published
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Text
Abstract [en]

In this article, we present a modelling approach for rapid dynamic wetting based on the phase field theory. We show that in order to model this accurately, it is important to allow for a non-equilibrium wetting boundary condition. Using a condition of this type, we obtain a direct match with experimental results reported in the literature for rapid spreading of liquid droplets on dry surfaces. By extracting the dissipation of energy and the rate of change of kinetic energy in the flow simulation, we identify a new wetting regime during the rapid phase of spreading. This is characterized by the main dissipation to be due to a re-organization of molecules at the contact line, in a diffusive or active process. This regime serves as an addition to the other wetting regimes that have previously been reported in the literature.

Place, publisher, year, edition, pages
2011. Vol. 682, p. 213-240
Keywords [en]
contact lines, drops, interfacial flows (free surface)
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:sh:diva-30109DOI: 10.1017/jfm.2011.211ISI: 000294775800010Scopus ID: 2-s2.0-80052182393OAI: oai:DiVA.org:sh-30109DiVA, id: diva2:932775
Funder
Swedish Research CouncilAvailable from: 2011-09-28 Created: 2016-06-01 Last updated: 2017-11-30Bibliographically approved

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Do-Quang, MinhAmberg, Gustav

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