ATTRACTION AND REPULSION OF SPIRAL WAVES BY LOCALIZED INHOMOGENEITIESIN EXCITABLE MEDIA

Citation
Ap. Munuzuri et al., ATTRACTION AND REPULSION OF SPIRAL WAVES BY LOCALIZED INHOMOGENEITIESIN EXCITABLE MEDIA, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 58(3), 1998, pp. 2689-2692
Citations number
23
Categorie Soggetti
Physycs, Mathematical","Phsycs, Fluid & Plasmas
ISSN journal
1063651X
Volume
58
Issue
3
Year of publication
1998
Part
A
Pages
2689 - 2692
Database
ISI
SICI code
1063-651X(1998)58:3<2689:AAROSW>2.0.ZU;2-6
Abstract
The anchoring and repelling of spiral waves in a two-dimensional homog eneous excitable medium in the presence of a localized defect is studi ed in the framework of a numerical model and the kinematical theory. D epending on the relative initial distance between the obstacle and the core center, the vortex is observed either to drift towards the obsta cle or to move away from it. The anchoring phenomenon is explained in terms of periodic perturbations of the front curvature, while the repu lsion is rather connected with inhomogeneous refractoriness, which aff ects the spiral tip motion.