Spiral tip meandering induced by excitability modulation |
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| Authors: | X Zhang G Hu |
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| Institution: | (1) Department of Physics, Beijing Normal University, Beijing, 100875, P.R. China;(2) Chinese Center for Advanced Science and Technology (World Laboratory), Beijing, 8730, P.R. China |
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| Abstract: | In this work, we introduce a spatiotemporal modulation for
excitability into an excitable medium, the Barkley model. The
modulation can make the spiral wave tip meandering. Various types of
periodic spiral and quasiperiodic meandering spiral motions can be
observed numerically by varying the modulation. And the theoretical
analysis for the conditions of Hopf bifurcation, based on an
ordinary-differential-equation (ODE) model, is applied to well
explain the rich behaviors of numerical simulations. |
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| Keywords: | 82 40 Ck Pattern formation in reactions with diffusion flow and heat transfer |
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