Suppression of Spiral Wave in Modified Orengonator Model

In this paper, a spatial perturbation scheme is proposed to suppressthe spiral wave in the modified Orengonator model, which is used todescribe the chemical reaction in the light-sensitive media. Thecontrollable external illumination Φ is perturbed with a spatial linear function. In our numerical simulation, the scheme is investigated by imposing the external controllable illuminationon the space continuously and/or intermittently. The numericalsimulation results confirm that the stable rotating spiral wavestill can be removed with the scheme proposed in this paper even ifthe controllable Φ changed vs. time and space synchronously. Then the scheme is also used to control the spiral wave and turbulence in the modified Fitzhugh-Nagumo model. It is found that the scheme is effective to remove the sable rotating andmeandering spiral wave but it costs long transient period and intensity of the gradient parameter to eliminate the spiral turbulence.