Lamellar structures and self-replicating spots in a reaction-diffusion system

Journal Article · Wed Mar 01 00:00:00 EST 1995 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)

DOI:https://doi.org/10.1103/PhysRevE.51.1899· OSTI ID:6456121

Lee, K J; Swinney, H L ^[1]

---

1. Center for Nonlinear Dynamics and the Department of Physics, The Univeristy of Texas, Austin, Texas 78712 (United States)

Experiments on a ferrocyanide-iodate-sulfite reaction-diffusion system reveal several different planar spatial patterns: stationary lamellae arising from a transverse front instability and a front interaction; spot patterns that undergo a continuous process of growth through replication and death through overcrowding; waves with a repulsive front interaction; and conventional excitable waves that annihilate upon collision. The patterns form in a thin gel layer that is in contact with a continuously fed stirred reservoir. Lamellae are observed in both multistable and monostable regimes of the gel layer, while the self-replicating spots are found in a monostable regime. Numerical simulations on a one-dimensional, four-species model of the ferrocyanide-iodate-sulfite reaction describe the observed front interaction phenomena and some aspects of the bifurcation sequences observed in the laboratory experiments.

• OSTI ID: 6456121
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States), Vol. 51:3; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FERROCYANIDES
CHEMICAL REACTION KINETICS
DIFFUSION
GELS
INSTABILITY
IODATES
LAMELLAE
NUMERICAL SOLUTION
ONE-DIMENSIONAL CALCULATIONS
SULFATES
COLLOIDS
COMPLEXES
DISPERSIONS
HALOGEN COMPOUNDS
IODINE COMPOUNDS
IRON COMPLEXES
KINETICS
OXYGEN COMPOUNDS
REACTION KINETICS
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPLEXES
400201* - Chemical & Physicochemical Properties