Rotating Chemical Waves in Small Circular Domains

N. Hartmann; M. Bär; I. G. Kevrekidis; K. Krischer; R. Imbihl

doi:10.1103/PhysRevLett.76.1384

Rotating Chemical Waves in Small Circular Domains

N. Hartmann, M. Bär, I. G. Kevrekidis, K. Krischer, and R. Imbihl

Phys. Rev. Lett. 76, 1384 – Published 19 February 1996

Abstract

The influence of the domain size on the properties of rotating waves in the $NO + CO$ reaction on a microstructured Pt(100) surface is investigated for circular geometries. Below a critical domain size, determined by the spiral wavelength in an unbounded medium, the frequency of the rotating waves increases substantially due to interaction of the wave tip with the boundary. The phenomena are reproduced qualitatively with a reaction-diffusion model.

Received 28 September 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.1384

Authors & Affiliations

N. Hartmann¹, M. Bär^1,2, I. G. Kevrekidis², K. Krischer¹, and R. Imbihl³

¹Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin, Germany
²Department of Chemical Engineering, Princeton University, Princeton, New Jersey 08544-5263
³Institut für Physikalische Chemie und Elektrochemie, Universität Hannover, Callinstrasse 3-3A, D-30167 Hannover, Germany