2026-04-19T14:31:25Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/127962025-12-05T17:02:06Zcom_2072_1057col_2072_478823col_2072_478917

00925njm 22002777a 4500 dc Sendiña Nadal, Irene author Alonso Muñoz, Sergio author Pérez Muñuzuri, Vicente author Gómez-Gesteira, Moncho author Pérez Villar, Vicente author Ramírez Piscina, Laureano author Casademunt i Viader, Jaume author Sancho, José M. author Sagués i Mestre, Francesc author 2010-06-08T10:12:57Z 2010-06-08T10:12:57Z 2000 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. Química física Dinàmica de fluids Física estadística Physical chemistry Statistical physics Fluid dynamics Brownian motion of spiral waves driven by spatiotemporal structured noise