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CPP: Chemische Physik und Polymerphysik

CPP 6: Self-organising Systems

CPP 6.3: Talk

Monday, March 8, 2004, 12:00–12:15, H 39

Chemically driven running drops — •Uwe Thiele, Karin John, and Markus Bär — Max-Planck Institut für Physik komplexer Systeme, Nöthnitzer Str.38, 01138 Dresden

A continuous dynamic model for the movement of a drop on a solid substrate is derived for (1) driving by an externally given gradient using a wettability gradient as an example and (2) driving by a self-produced wettability gradient. The latter case of self-propelled drops on reactive substrates corresponds to such experimentally found free-running droplets (Dos Santos, D. F. and Ondarcuhu, T., PRL 75, 2972 (1995)). The moving-droplet solutions of the model are investigated in detail.