Front aggregation in multiarmed excitation vortices

被引：9

作者：

Ginn, BT ^{[1
]}

Steinbock, O ^{[1
]}

机构：

[1] Florida State Univ, Dept Chem & Biochem, Tallahassee, FL 32306 USA

来源：

PHYSICAL REVIEW E | 2005年 / 72卷 / 04期

关键词：

D O I：

10.1103/PhysRevE.72.046109

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Using the Belousov-Zhabotinsky reaction, we study the pinning of multiarmed spiral waves to nonexcitable obstacles. With increasing obstacle size, the individual arms switch from a repulsive to an attractive state. This transition yields densely aggregated spiral arms and is caused by anomalous dispersion. A kinematic model reproduces the measurements quantitatively and identifies the transition as a supercritical pitchfork bifurcation.

引用

页数：4

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