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Lifetime enhancement of scroll rings by spatiotemporal fluctuations
Pérez Muñuzuri, Vicente; Sagués i Mestre, Francesc; Sancho, José M.
Universitat de Barcelona
The dynamics of three-dimensional scroll rings with spatiotemporal random excitability is investigated numerically using the FitzHugh-Nagumo model. Depending on the correlation time and length scales of the fluctuations, the lifetime of the ring filament is enlarged and a resonance effect between the time scale of the scroll ring and the time correlation of the noise is observed. Numerical results are interpreted in terms of a simplified stochastic model derived from the kinematical equations for three-dimensional excitable waves.
2011-07-26
Dinàmica de fluids
Química física
Fluid dynamics
Physical chemistry
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The American Physical Society
         

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