title: Chaotic advection, diffusion, and reactions in open flows.
abstract: We review and generalize recent results on advection of particles in open time-periodic hydrodynamical flows. First, the problem of passive advection is considered, and its fractal and chaotic nature is pointed out. Next, we study the effect of weak molecular diffusion or randomness of the flow. Finally, we investigate the influence of passive advection on chemical or biological activity superimposed on open flows. The nondiffusive approach is shown to carry some features of a weak diffusion, due to the finiteness of the reaction range or reaction velocity. (c) 2000 American Institute of Physics.
authors.affiliation: Institute for Theoretical Physics, Eotvos University, P.O. Box 32, H-1518 Budapest, Hungary.
authors.forename: Tamas
authors.initials: T
authors.lastname: Tel
authors.forename: Gyorgy
authors.initials: G
authors.lastname: Karolyi
authors.forename: Aron
authors.initials: A
authors.lastname: Pentek
authors.forename: Istvan
authors.initials: I
authors.lastname: Scheuring
authors.forename: Zoltan
authors.initials: Z
authors.lastname: Toroczkai
authors.forename: Celso
authors.initials: C
authors.lastname: Grebogi
authors.forename: James
authors.initials: J
authors.lastname: Kadtke