title: Reactive particles in random flows.
abstract: We study the dynamics of chemically or biologically active particles advected by open flows of chaotic time dependence, which can be modeled by a random time dependence of the parameters on a stroboscopic map. We develop a general theory for reactions in such random flows, and derive the reaction equation for this case. We show that there is a singular enhancement of the reaction in random flows, and this enhancement is increased as compared to the nonrandom case. We verify our theory in a model flow generated by four point vortices moving chaotically.
authors.affiliation: Center for Applied Mathematics and Computational Physics and Department of Structural Mechanics, Budapest University of Technology and Economics, Muegyetem rkp. 3, H-1521 Budapest, Hungary.
authors.forename: György
authors.initials: G
authors.lastname: Károlyi
authors.forename: Tamás
authors.initials: T
authors.lastname: Tél
authors.forename: Alessandro P S
authors.initials: AP
authors.lastname: de Moura
authors.forename: Celso
authors.initials: C
authors.lastname: Grebogi
mesh_terms: D008954:Models, Biological; D008962:Models, Theoretical; D017711:Nonlinear Dynamics; D010316:Particle Size