title: Advection of passive particles over flow networks.
abstract: The problem of stochastic advection of passive particles by circulating conserved flows on networks is formulated and investigated. The particles undergo transitions between the nodes, with the transition rates determined by the flows passing through the links. Such stochastic advection processes lead to mixing of particles in the network and, in the final equilibrium state, concentration of particles in all nodes becomes equal. As we find, equilibration begins in the subset of nodes, representing flow hubs, and extends to the periphery nodes with weak flows. This behavior is related to the effect of localization of the eigenvectors of the advection matrix for considered networks. Applications of the results to problems involving spreading of infections or pollutants by traffic networks are discussed.
authors.affiliation: Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany.
authors.forename: Shigefumi
authors.initials: S
authors.lastname: Hata
authors.affiliation: Department of Mechanical and Environmental Informatics, Tokyo Institute of Technology, Ookayama 2-12-1, 152-8552 Tokyo, Japan.
authors.forename: Hiroya
authors.initials: H
authors.lastname: Nakao
authors.affiliation: Department of Physical Chemistry, Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany.
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Mikhailov
mesh_terms: D001272:Atmosphere / Q000737:chemistry*; D003198:Computer Simulation; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry*; D012212:Rheology / Q000379:methods*; D012996:Solutions / Q000737:chemistry*; D013269:Stochastic Processes
chemical_list: D012996:Solutions