Rings on strings in excitable media
Pattern Formation and Solitons
2018-01-10 v1 Soft Condensed Matter
High Energy Physics - Theory
Fluid Dynamics
Abstract
We study the dynamics and interaction of coaxial vortex rings in the FitzHugh-Nagumo excitable medium. We find that threading vortex rings with a vortex string results in significant qualitative differences in their evolution and interaction. In particular, threading prevents the annihilation of rings in a head-on collision, allows generic ring overtaking, and can even reverse the direction of motion of a ring. We identify that an important mechanism for producing this new behaviour is that threaded vortex rings interact indirectly via induced twisting of the threading vortex string.
Cite
@article{arxiv.1712.04693,
title = {Rings on strings in excitable media},
author = {Fabian Maucher and Paul Sutcliffe},
journal= {arXiv preprint arXiv:1712.04693},
year = {2018}
}
Comments
17 pages, 11 figures. To appear in Journal of Physics A