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DY: Fachverband Dynamik und Statistische Physik

DY 44: Pattern Formation

DY 44.3: Talk

Thursday, March 19, 2015, 10:00–10:15, BH-N 333

Turning Spirals into Fingers: The Impact of Advection on Pattern-Formation in Excitable Media — •Munir Salman, Philipp Bauer, and Katharina Krischer — Physik Department, Nonequilibrium Chemical Physics, TU München, James-Franck-Str. 1, 85748 Garching, Germany

Inspired by experimentally observed solitary waves with non-curling open ends in an electrochemical flow cell, we present simulations in a two dimensional excitable reaction-diffusion-advection system. Depending on the advection strength, the tip of spiral waves can be pushed toward the flow outlet, leaving a uniform system, or driven against the advective flow, resulting in a finger-shaped wave fragment. Thus, the peculiar experimental traveling 'fingers' can be explained by the presence of advective flow in the experimental system.