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Brownian motion of spiral waves driven by spatiotemporal structured noise
Sendiña Nadal, Irene; Alonso Muñoz, Sergio; Pérez Muñuzuri, Vicente; Gómez-Gesteira, M.; Pérez Villar, Vicente; Ramírez Piscina, Laureano; Casademunt i Viader, Jaume; Sancho, José M.; Sagués i Mestre, Francesc
Universitat de Barcelona
Spiral chemical waves subjected to a spatiotemporal random excitability are experimentally and numerically investigated in relation to the light-sensitive Belousov-Zhabotinsky reaction. Brownian motion is identified and characterized by an effective diffusion coefficient which shows a rather complex dependence on the time and length scales of the noise relative to those of the spiral. A kinematically based model is proposed whose results are in good qualitative agreement with experiments and numerics.
2010-06-09
Química física
Dinàmica de fluids
Física estadística
Physical chemistry
Statistical physics
Fluid dynamics
(c) American Physical Society, 2000
Article
American Physical Society
         

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