Standing waves in a two-dimensional reaction-diffusion
model with the short-wave instability
Dolnik M, Rovinsky AB, Zhabotinsky AM, Epstein IR
JOURNAL OF PHYSICAL CHEMISTRY A
103 (1): 38-45 JAN 7 1999
Abstract:
Various patterns of standing waves are found beyond the onset of the
short-wave instability in a model reaction-diffusion system.
These include plain and modulated stripes, squares, and rhombi in systems
with square and rectangular geometry and patterns with
rotational symmetry in systems with circular geometry. We also find
standing waves consisting of periodic time sequences of
stripes and rhombi, stripes and squares, and stripes, rhombi, and hexagons.
The short-wave instability can lead to a much greater
variety of spatio-temporal patterns than the aperiodic Turing and the
long-wave oscillatory instabilities. For instance, a single
oscillatory cycle can display all the basic patterns related to the
aperiodic Turing instability-stripes, hexagons, and inverted
hexagons (honeycomb)-as well as rhombi and modulated stripes.