Europhys. Lett.
Volume 75, Number 6, September 2006
Page(s) 875 - 881
Section General
Published online 25 August 2006
Europhys. Lett., 75 (6), pp. 875-881 (2006)
DOI: 10.1209/epl/i2006-10211-9

Controlling turbulence in excitable media by applying boundary periodic pacing and gradient force

Z. Cao1, H. Zhang2, F. Xie3 and G. Hu4, 1, 5

1  Department of Physics, Beijing Normal University - Beijing, 100875, PRC
2  Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University Hangzhou 310027, PRC
3  Department of Medicine (Cardiology) and Department of Physiological Science University of California at Los Angeles School of Medicine Los Angeles, CA 90095, USA
4  Chinese Center for Advanced Science and Technology (World Laboratory) Beijing 8730, PRC
5  Beijing-Hong Kong-Singapore Joint Center of Nonlinear and Complex Systems Beijing Normal University Branch - Beijing, PRC

received 8 March 2006; accepted in final form 27 July 2006
published online 25 August 2006

Spiral wave and turbulence control in excitable media by applying periodic pacing on system's boundary is investigated. It is found that spiral waves can be always successfully controlled by boundary periodic forcing with suitable forcing amplitude and frequency. Turbulence caused by spiral-wave breakup is uncontrollable by the boundary pacing, whatever the forcing amplitude and frequency, if the system parameters are in the backfiring (Phys. Rev. E, 48 (1993) R1635) region. We find further that gradient coupling can remarkably improve the control effect of the boundary pacing, by considerably enlarging the controllable parameter area.

05.70.Ln - Nonequilibrium and irreversible thermodynamics.
82.40.Ck - Pattern formation in reactions with diffusion flow and heat transfer.
47.54.-r - Pattern selection; pattern formation.

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