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  • Chirality and curvature determine the meandering of spirals in multilayer excitable media [Elektronski vir]
    Hajian, Dorsa Nezhad ...
    We study the emergence of meandering spiral waves in a multilayer structure where two spirals, originating independently, evolve in space-time. The FitzHugh-Nagumo model, enhanced with ... electromagnetic induction effects, defines the nodal dynamics. The layers are chemically coupled, and the drift of spirals is influenced by interlayer flux coupling. An external magnetic flux force is also necessary to destabilize and unpin spiral rotors. The effects of unique characteristics of spiral patterns, like chirality and tip curvature, are assessed. We find that spirals often drift within a bounded meandering area; however, determining the drift directions and overall meandering regions is complex. The forced spiral generally drifts a greater distance, except for identical co-rotating spirals, which drift synchronously. Spirals with opposite chirality exhibit asynchronous drift and wavefront asymmetry, even with identical tip curvature. Regardless of chirality, non-identical spirals are geometrically aligned and amplified before drifting. Stimulating the more loosely curved spiral ensures both spirals drift.
    Source: Proceedings of the royal society A. Mathematical, Physical and Engineering Sciences [Elektronski vir]. - ISSN 1471-2946 (Vol. 479, iss. 2280, [article no.] 20230730, Dec. 2023, 16 str.)
    Type of material - e-article ; adult, serious
    Publish date - 2023
    Language - english
    COBISS.SI-ID - 178518531
    DOI

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