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16 April 2024

» pubmed » pmid11017312

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Brownian motion of spiral waves driven by spatiotemporal structured noise
I Sendina-Nadal ; S Alonso ; V Perez-Munuzuri ; M Gomez-Gesteira ; V Perez-Villar ; L Ramirez-Piscina ; J Casademunt ; J M Sancho ; F Sagues ;
Date:	20 Mar 2000
Journal:	Phys Rev Lett, 84 (12), 2734-7
Abstract:	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.
Source:	PubMed, pmid11017312
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