期刊
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
卷 51, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1751-8121/aaa1ba
关键词
spiral wave vortices; excitable media; FitzHugh-Nagumo model; threaded vortex rings
资金
- Leverhulme Trust [RP2013-K-009]
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.
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