On the coalescence of sessile drops with miscible liquids
Lehrstuhl Statistische Physik/Nichtlineare Dynamik, Brandenburgische Technische Universität, D-03046, Cottbus, Germany
* e-mail: email@example.com
Accepted: 8 August 2011
Published online: 22 August 2011
Sessile drops sitting on highly wettable solid substrates fuse in qualitatively different ways after contact, depending on the surface tension gradients between the mixing droplets. In early time evolution the drop coalescence can be fast or delayed (intermittent). In long time evolution a secondary drop formation can occur. We study numerically droplet dynamics during coalescence in two and three spatial dimensions, within a phase field approach. We discuss criteria to distinguish different coalescence regimes. A comparison with recent experiments will be done.
© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg, 2011