别洛索夫-扎博京斯基介质中电流引发的螺旋破裂

Spiral breakup induced by an electric current in a Belousov-Zhabotinsky medium.

作者信息

Taboada J. J., Munuzuri A. P., Perez-Munuzuri V., Gomez-Gesteira M., Perez-Villar V.

机构信息

Group of Nonlinear Physics, Faculty of Physics, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain.

出版信息

Chaos. 1994 Sep;4(3):519-524. doi: 10.1063/1.166030.

DOI:10.1063/1.166030

PMID:12780128

Abstract

Sprial breakup in the Belousov-Zhabotinsky reaction has been observed under the influence of an externally applied alternating electric current. The dynamic mechanism of this breakup is explained in the framework of this reaction. The dependence of the critical electric current amplitude on the period of the wave and on the excitability of the medium is analyzed. Spiral breakup is shown to provide a limit of validity of electric-field-induced drift of vortices in excitable media. Experimental results are complemented with numerical simulations provided by two- and three-variable Oregonator models.

摘要

在外部施加的交变电流影响下，观察到了贝洛索夫-扎博廷斯基反应中的螺旋波破裂现象。在该反应的框架内解释了这种破裂的动力学机制。分析了临界电流幅值对波周期和介质兴奋性的依赖性。结果表明，螺旋波破裂为可激发介质中电场诱导的涡旋漂移的有效性提供了一个极限。通过两变量和三变量俄勒冈振子模型进行的数值模拟对实验结果进行了补充。