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DY: Fachverband Dynamik und Statistische Physik

DY 22: Posters I

DY 22.39: Poster

Mittwoch, 28. März 2012, 17:00–19:00, Poster A

Dynamics of scroll rings in confined geometry — •Arash Azhand, Teresa Reinhard, Rico Buchholz, and Harald Engel — Institut für Theoretische Physik, TU Berlin, Hardenbergstr. 36, EW 7-1, D- 10623 Berlin

The undamped propagation of three-dimensional travelling waves has been observed in a variety of dissipative active media including chemical waves, temperature waves in solid fuel combustion, and waves of electric activity in heart tissue, for example. We study modifications to the intrinsic dynamics of such scroll waves caused by perturbations originating from the surrounding boundaries during wave propagation in confined geometry. In particular, we focus on the evolution of scroll rings interacting with Neumann type boundaries in thin layers of the photo-sensitive Belousov-Zhabotinsky reaction. The experimental results are compared to numerical simulations with the underlying Oregonator model.