Phys. Rev. Lett. 84, 1047–1050 (2000)

Transition from Spirals to Defect-Mediated Turbulence Driven by a Doppler Instability

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Qi Ouyang^1,*, Harry L. Swinney^2,†, and Ge Li²
¹Department of Physics, Mesoscopic Physics Laboratory, Peking University, Beijing 100871, China
²Center for Nonlinear Dynamics and Department of Physics, The University of Texas at Austin, Austin, Texas 78712

Received 9 August 1999; published in the issue dated 31 January 2000

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.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.84.1047

DOI:

10.1103/PhysRevLett.84.1047

PACS:

82.40.Ck, 47.54.+r, 82.20.Mj, 87.19.Hh

^*Electronic address: qi@mail.phy.pku.edu.cn

^†Electronic address: swinney@chaos.ph.utexas.edu

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Phys. Rev. Lett. 84, 1047–1050 (2000)

Transition from Spirals to Defect-Mediated Turbulence Driven by a Doppler Instability