Universality in dynamic wetting dominated by contact-line friction

We report experiments on the rapid contact-line motion present in the early stages of capillary-driven spreading of drops on dry solid substrates. The spreading data fail to follow a conventional viscous or inertial scaling. By integrating experiments and simulations, we quantify a contact-line fric...

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Bibliographic Details
Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2012-04, Vol.85 (4 Pt 2), p.045302-045302, Article 045302
Main Authors: Carlson, Andreas, Bellani, Gabriele, Amberg, Gustav
Format: Article
Language:English
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Summary:We report experiments on the rapid contact-line motion present in the early stages of capillary-driven spreading of drops on dry solid substrates. The spreading data fail to follow a conventional viscous or inertial scaling. By integrating experiments and simulations, we quantify a contact-line friction μ(f) which is seen to limit the speed of the rapid dynamic wetting. A scaling based on this contact-line friction is shown to yield a universal curve for the evolution of the contact-line radius as a function of time, for a range of fluid viscosities, drop sizes, and surface wettabilities.
ISSN:1539-3755
1550-2376
1550-2376
DOI:10.1103/physreve.85.045302