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Numerical simulation study on effects of alternansbehavior on spiral waves

Wei Hai-Ming Tang Guo-Ning

Numerical simulation study on effects of alternansbehavior on spiral waves

Wei Hai-Ming, Tang Guo-Ning
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  • Received Date:  12 July 2010
  • Accepted Date:  26 July 2010
  • Published Online:  05 February 2011

Numerical simulation study on effects of alternansbehavior on spiral waves

  • 1. College of Physics and Technology,Guangxi Normal University,Guilin 541004,China

Abstract: The alternans behavior is considered in the Greenberg-Hasting model of discrete excitable medium. The effect of the alternans behavior on spiral wave is investigated. The numerical results show that when the relevant parameters are appropriately chosen the alternans behavior has a significant influence on spiral waves. For example, the alternans behavior leads to the oscillation of the shape of the spiral wave and to the generation of the breathing spiral wave. The alternans behavior induces the meandering and the drifting of spiral waves, even causes spiral wave to move out of the system. Spiral wave can break up into multiple spiral waves, anti-target wave and spatiotemporal chaos due to the alternans behavior. The phenomena that the alternans behavior leads to the conduction barrier in homogeneous medium and causes spiral wave to break up or vanish, are observed for the first time. The physical mechanisms about these phenomena are briefly analyzed.

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