title: Transition from spirals to defect-mediated turbulence driven by a doppler instability.
abstract: A transition from rotating chemical spirals to turbulence is observed in experiments on the Belousov-Zhabotinsky reaction. The transition occurs when the waves near the spiral tip spontaneously break, generating defects. Measurements reveal that this defect-mediated turbulence is caused by the Doppler effect on the traveling waves. The observations are in good accord with numerical simulations and theory.
authors.affiliation: Department of Physics, Mesoscopic Physics Laboratory, Peking University, Beijing 100871, China.
authors.forename: Q
authors.initials: Q
authors.lastname: Ouyang
authors.forename: H L
authors.initials: HL
authors.lastname: Swinney
authors.forename: G
authors.initials: G
authors.lastname: Li
mesh_terms: D004301:Doppler Effect; D008314:Malonates / Q000737:chemistry; D008954:Models, Biological; D008956:Models, Chemical; D008962:Models, Theoretical
chemical_list: D008314:Malonates; C030290:malonic acid