Publication: Dynamics of rigidly rotating spirals under periodic modulation of excitability
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Issued Date
2005-12-16
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ISSN
00092614
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2-s2.0-28444499770
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Mahidol University
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SCOPUS
Bibliographic Citation
Chemical Physics Letters. Vol.416, No.4-6 (2005), 364-369
Suggested Citation
Supichai Kantrasiri, Pramote Jirakanjana, On Uma Kheowan Dynamics of rigidly rotating spirals under periodic modulation of excitability. Chemical Physics Letters. Vol.416, No.4-6 (2005), 364-369. doi:10.1016/j.cplett.2005.09.108 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/16420
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Title
Dynamics of rigidly rotating spirals under periodic modulation of excitability
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Abstract
The dynamics of rigidly rotating spiral waves under periodic modulation of excitability is studied experimentally in the photosensitive Belousov-Zhabotinsky reaction. The experiments of sinusoidal and pulsatory modulation reveal that the motion of the spiral tips can be forced to describe a wide range of cycloidal trajectories, depending strongly on the modulation period. The results are complemented with numerical simulations and discussed in the framework of the kinematical theory. We found that the critical parameter for a linear resonance drift under the periodic modulation is not only 'the modulation period', as reported earlier, but also the amplitude and duration of modulation. © 2005 Elsevier B.V. All rights reserved.