Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Série APC-TH
Domaines hep-th
Date Mardi 13 Octobre 2015
Heure 14:00
Institut APC
Salle 483A Malevitch
Nom de l'orateur Andreotti
Prenom de l'orateur Bruno
Addresse email de l'orateur
Institution de l'orateur ESPCI - Université Paris Diderot
Titre The dynamic contact line problem. How multiscale problems are solved in soft condensed matter
Résumé The speed at which liquid can move over a solid surface is strongly limited when a three-phase contact line is present, separating wet from dry regions. When enforcing large contact line speeds this leads to entrainment of drops, films or air bubbles. I will discuss experimental and theoretical progress revealing the physical mechanisms behind these dynamical wetting transitions. In this context I will discuss microscopic processes taking place at the microscopic scale: capillarity, thermally activated motion over heterogeneities, deformations of the substrate, evaporation, etc. I will then show how the asymptotic matching technique allows one to describe quantitatively a problem in which the inner and outer scales, separated by 6 decades, remains coupled.
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