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Expanding scroll rings and negative tension turbulence in a model of excitable media
Alonso, S.; Kahler, R.; Mikhailov, A. S. (Alexander S.), 1950-; Sagués i Mestre, Francesc
Universitat de Barcelona
Scroll waves in excitable media, described by the Barkley model, are studied. In the parameter region of weak excitability, negative tension of wave filaments is found. It leads to expansion of scroll rings and instability of wave filaments. A circular filament tends to stretch, bend, loop, and produce an expanding tangle that fills up the volume. The filament does not undergo fragmentation before it touches the boundaries. Statistical properties of such Winfree turbulence of scroll waves are numerically investigated.
2011-07-26
Física estadística
Termodinàmica
Química física
Statistical physics
Thermodynamics
Physical chemistry
(c) American Physical Society, 2004
Article
The American Physical Society
         

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