title: Spatiotemporal irregularity in an excitable medium with shear flow.
abstract: We consider an excitable medium moving with relative shear, subjected to a localized disturbance that in a stationary medium would produce a pair of spiral waves. The spiral waves so created are distorted and then broken by the motion of the medium. Such breaks generate new spiral waves, and so a "chain reaction" of spiral wave births and deaths is observed. This leads to a complicated spatiotemporal pattern, the "frazzle gas" [term suggested by Markus et al., Nature (London) 371, 402 (1994)], which eventually fills the whole medium. In this paper, we display and interpret the main features of the pattern.
authors.affiliation: School of Biomedical Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom.
authors.forename: V N
authors.initials: VN
authors.lastname: Biktashev
authors.forename: I V
authors.initials: IV
authors.lastname: Biktasheva
authors.forename: A V
authors.initials: AV
authors.lastname: Holden
authors.forename: M A
authors.initials: MA
authors.lastname: Tsyganov
authors.forename: J
authors.initials: J
authors.lastname: Brindley
authors.forename: N A
authors.initials: NA
authors.lastname: Hill