Transition from spirals to defect-mediated turbulence driven by a doppler instability |
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| Authors: | Ouyang Q Swinney H L Li G |
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| Institution: | Department of Physics, Mesoscopic Physics Laboratory, Peking University, Beijing 100871, China. |
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| 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. |
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