Math @ Duke

Publications [#244229] of Thomas P. Witelski
search www.ams.org.Papers Published
 Aguareles, M; Chapman, SJ; Witelski, T, Motion of spiral waves in the complex GinzburgLandau equation,
Physica D: Nonlinear Phenomena, vol. 239 no. 7
(April, 2010),
pp. 348365, ISSN 01672789 [003], [doi]
(last updated on 2018/03/21)
Abstract: Solutions of the general cubic complex GinzburgLandau equation comprising multiple spiral waves are considered. For parameters close to the vortex limit, and for a system of spiral waves with wellseparated centres, laws of motion of the centres are found which vary depending on the order of magnitude of the separation of the centres. In particular, the direction of the interaction changes from along the line of centres to perpendicular to the line of centres as the separation increases, with the strength of the interaction algebraic at small separations and exponentially small at large separations. The corresponding asymptotic wavenumber and frequency are determined. These depend on the positions of the centres of the spirals, and so evolve slowly as the spirals move. © 2009 Elsevier B.V.


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