Robustness of free and pinned spiral waves against breakup by electrical forcing in excitable chemical media

Physical Review. E
Metinee PhantuChaiya Luengviriya

Abstract

We present an investigation on the breakup of free and pinned spiral waves under an applied electrical current in the Belousov-Zhabotinsky reaction. Spiral fronts propagating towards the negative electrode are decelerated. A breakup of the spiral waves occurs when some segments of the fronts are stopped by a sufficiently strong electrical current. In the absence of obstacles (i.e., free spiral waves), the critical value of the electrical current for the wave breakup increases with the excitability of the medium. For spiral waves pinned to circular obstacles, the critical electrical current increases with the obstacle diameter. Analysis of spiral dynamics shows that the enhancement of the robustness against the breakup of both free and pinned spiral waves is originated by the increment of wave speed when either the excitability is strengthened or the obstacle size is enlarged. The experimental findings are reproduced by numerical simulations using the Oregonator model. In addition, the simulations reveal that the robustness against the forced breakup increases with the activator level in both cases of free and pinned spiral waves.

References

Jan 1, 1968·Internationale Zeitschrift für angewandte Physiologie, einschliesslich Arbeitsphysiologie·N B StrydomA J Heyns
Nov 1, 1993·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·A P MuñuzuriV Pérez-Villar
Jan 13, 1992·Physical Review Letters·O SteinbockS C Müller
Apr 5, 1993·Physical Review Letters·M CourtemancheJ P Keener
Dec 29, 2004·Biophysical Chemistry·Lenka SebestikovaHana Sevcikova
Dec 31, 2005·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Ya-Qing FuGang Hu
Apr 25, 2006·Physical Chemistry Chemical Physics : PCCP·Chaiya LuengviriyaStefan C Müller
Nov 8, 2006·Circulation·Zhan Yang LimLeslie Tung
Apr 22, 1988·Science·J RossC Vidal
Feb 11, 1972·Science·A T Winfree
Oct 30, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Malee SutthiopadChaiya Luengviriya
Dec 11, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Jiraporn LuengviriyaChaiya Luengviriya

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