Replication of noise-sustained autocatalytic chemical structures

G. IZÚS; R. DEZA; A. D. SÁNCHEZ

JOURNAL OF CHEMICAL PHYSICS

AMER INST PHYSICS

Año: 2010 vol. 132 p. 2341121 - 2341127

0021-9606

Autocatalytic systems in a diferential-flow reactor may undergo a diferential-flow-induced chemical instability towards a convectively unstable regime, in which noise-sustained structures may appear. This is the case of a system with Gray-Scott kinetics in a packed-bed reactor, as reported in [Phys. Rev. E 67, 056207 (2003)]. In this work, two identical copies of such a system are coupled in master-slave configuration and submitted to independent spatiotemporal Gaussian white noise sources. Numerical simulation of 2D reactors with uniform and Poiseuille flows reveals that the slave system replicates to a very high degree of precision the convective patterns arising in the master one due to the presence of noise. The quality of this synchronization is assessed through several measures. A convective instability in the synchronization manifold is theoretically predicted and numerically confirmed.