contact line

Monday, March 26, 2018 - 9:00am - 9:30am
Jens Eggers (University of Bristol)
We study air entrainment by a solid plate plunging into a viscous liquid, theoretically and numerically. At dimensionless speeds Ca = Uη/γ of order unity, a near-cusp forms due to the contact line. The radius of curvature of the cusp’s tip scales by the slip length multiplied by an exponential of -Ca. The pressure from the air flow drawn inside the cusp leads to a bifurcation, at which air is entrained, i.e. there is ‘wetting failure’.
Tuesday, March 27, 2018 - 9:40am - 10:10am
Eugene Benilov (University of Limerick)
Recent comparisons of theoretical models of contact lines with experimental results (Podgorski et al. 2001, Winkels et al. 2011, Puthenveettil et al. 2013, Benilov & Benilov 2015) show that, in some cases, the most popular model – based on the Navier-slip condition and a prescribed contact angle – works only if the slip length is unreasonably small (subatomic).
Tuesday, March 27, 2018 - 9:00am - 9:30am
Stephen Wilson (University of Strathclyde)
The evaporation of a sessile droplet is a practically important one which is currently the subject of intense research activity both because of the wide range of practical applications (such as, for example, ink-jet printing and industrial cooling) in which it arises and the fascinating and complex behaviour is can exhibit.
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