Control of spiral turbulence by periodic forcing in a reaction-diffusion system with gradients

被引：8
|
作者：
Wu, Yabi [1 ]
Qiao, Chun [1 ]
Qi Ouyang [1 ,2 ,3 ]
Wang, HongLi [1 ,2 ,3 ]
机构：
[1] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
[2] Peking Univ, Beijing Hong Kong Singapore Joint Ctr Nonlinear &, Beijing 100871, Peoples R China
[3] Peking Univ, Ctr Theoret Biol, Beijing 100871, Peoples R China
来源：
PHYSICAL REVIEW E | 2008年 / 77卷 / 03期
关键词：
D O I：
10.1103/PhysRevE.77.036226
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：
We report an experimental result on successfully controlling spiral turbulence in a reaction-diffusion system. The control is realized by periodic forcing in a three-dimensional Belousov-Zhabotinsky reaction-diffusion system, which has chemical concentration gradients in the third dimension. We observe that, in the oscillatory regime of the system, a suitable periodic forcing may stabilize scroll waves (SWs), which otherwise undergo a transition to spiral turbulence. Relating the spiral phase shift due to gradients and the forcing frequency, the mechanism of the control can be well understood by modulating the phase twist of SWs. We use the FitzHugh-Nagumo model to demonstrate this mechanism.
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页数：4
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