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Motion of spiral waves induced by local pacing

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Chen J.-X., Wei G.-N., Li B.-W., Xu J.-R.

Open Physics

2008

vol. 6

issue 3

427-433

The motion of spiral waves in excitable media driven by a weak pacing around the spiral tip is investigated numerically as well as theoretically. We presented a Bifurcations diagram containing four types of the spiral motion induced by different frequencies of pacing: rigidly rotating, inward-petal meandering, resonant drift, and outward-petal meandering spiral. Simulation shows that the spiral resonantly drifts when the frequency of pacing is close to that of the spiral rotation. We also find that the speed and direction of the drift can be efficiently controlled by means of the strength and phase of the local pacing, which is consistent with analytical results based on the framework of the weak deformation approximation.

Controlling chaos by developing spiral wave from heterogeneity in excitable medium

100%

Chen J.-X., Xu J.-R., Zhang X.-P., Zhang J.-W., Zhang X.-W.

Open Physics

2009

vol. 7

issue 1

108-113

We study pattern formation induced by a spiral wave developing from heterogeneities in an excitable medium. Turbulence can be suppressed by a spiral wave from the heterogeneity, forming multiple coexistent systems of regular geometrical patterns. We find that the types of these patterns depend critically on the degree of heterogeneity. The underlying mechanism is due to dispersion relation which is characterized by excitability.

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2 Open Physics

1 2009

1 2008

2 Chen J.-X.

2 Xu J.-R.

1 Li B.-W.

1 Wei G.-N.

1 Zhang J.-W.

1 Zhang X.-P.

1 Zhang X.-W.

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Motion of spiral waves induced by local pacing

Controlling chaos by developing spiral wave from heterogeneity in excitable medium