WAVE INSTABILITIES IN EXCITABLE MEDIA WITH FAST INHIBITOR DIFFUSION

Citation
Vs. Zykov et al., WAVE INSTABILITIES IN EXCITABLE MEDIA WITH FAST INHIBITOR DIFFUSION, Physical review letters, 81(13), 1998, pp. 2811-2814
Citations number
19
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
81
Issue
13
Year of publication
1998
Pages
2811 - 2814
Database
ISI
SICI code
0031-9007(1998)81:13<2811:WIIEMW>2.0.ZU;2-F
Abstract
An excitable activator-inhibitor system with relatively fast inhibitor diffusion is considered. Numerical simulations of wave propagation in side long channels show transitions from stable flat traveling waves t o folded waves and further to spreading spiral turbulence as the inhib itor diffusivity is increased. For sufficiently narrow channels the su ppression of turbulence and the development of regular steadily propag ating patterns is observed. The curvature dependence of the wave propa gation velocity is derived and used to interpret the observed phenomen a.