Transition from spirals to defect-mediated turbulence driven by a Doppler instability

Authors
Qi, OY Swinney, HL Li, G
Citation
Oy. Qi et al., Transition from spirals to defect-mediated turbulence driven by a Doppler instability, PHYS REV L, 84(5), 2000, pp. 1047-1050
Citations number
23
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
84
Issue
5
Year of publication
2000
Pages
1047 - 1050
Database
ISI
SICI code
0031-9007(20000131)84:5<1047:TFSTDT>2.0.ZU;2-U
Abstract
A transition from rotating chemical spirals to turbulence is observed in ex periments on the Belousov-Zhabotinsky reaction. The transition occurs when the waves near the spiral tip spontaneously break, generating defects. Meas urements reveal that this defect-mediated turbulence is caused by the Doppl er effect on the traveling waves. The observations are in good accord with numerical simulations and theory.