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Durham University

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Publication details for Paul Sutcliffe

Maucher, Fabian & Sutcliffe, Paul (2018). Rings on strings in excitable media. Journal of Physics A: Mathematical and Theoretical 51(5): 055102.

Author(s) from Durham


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.