Brownian motion of spiral waves driven by spatiotemporal structured noise
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.
Sendina-Nadal
I
Group of Nonlinear Physics, Faculty of Physics, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain.
Alonso
S
Perez-Munuzuri
V
Gomez-Gesteira
M
Perez-Villar
V
Ramirez-Piscina
L
Casademunt
J
Sancho
JM
Sagues
F