Regensburg 2013 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 7: Poster I

DY 7.24: Poster

Montag, 11. März 2013, 17:30–19:30, Poster C

Scroll ring dynamics under spatial Confinement — •Jan Frederik Totz¹, Oliver Steinbock², and Harald Engel¹ — ¹Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany — ²Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL-32306-4390

Non-planar excitation waves are exhibited by a variety of dissipative non-equilibrium systems, including chemical waves, fuel combustion, catalytic oxidation of CO and electric activity in the heart muscle. Using the Ferroin-catalyzed Belousov-Zhabotinsky reaction, we investigate the dynamics of scroll rings in a chemical medium of adjustable height [1]. The close proximity to the boundaries leads to dramatic changes of the intrinsic dynamics, as the contraction can be reverted into an expansion of the organizing vortex ring. Results from chemical experiments are in good agreement with numerical simulations based on parameters derived from the used chemical concentrations and can be predicted qualitatively with a simple phenomenological model.

[1] Z. A. Jiménez, B. Marts, O. Steinbock, Phys. Rev. Lett. 102, 244101 (2009)