Dresden 2009 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 12: Poster I

DY 12.7: Poster

Tuesday, March 24, 2009, 14:30–16:30, P1A

Study of Droplet-Coalescence for Miscible Liquids — •Stefan Menzel and Michael Bestehorn — Lehrstuhl Statistische Physik/ Nichtlineare Dynamik, Brandenburgische Technische Universität Cottbus, Deutschland

Two miscible droplets flowing together are studied numerically using an extension of the thin film equation. Recent experimental observations show that sessile droplets not only fuse instantaneously after peripheral contact but also coalesce delayed for many seconds [1]. This rather unusual behavior occurred for droplets with small contact angles consisting of different liquids. After initial contact a thin gap between the droplets was observed through which liquid is exchanged from the low to the high surface tension liquid.

[1] H. Riegler, P. Lazar, Langmuir Vol. 24 (2008) 6395-6398.