title: Tracer dispersion in a percolation network with spatial correlations
abstract: We analyze the transport properties of a neutral tracer in a carrier fluid flowing through percolationlike porous media with spatial correlations. We model convection in the mass transport process using the velocity field obtained by the numerical solution of the Navier-Stokes and continuity equations in the pore space. We find that the resulting statistical properties of the tracer show a transition from a subdiffusion regime at low Peclet number to an enhanced diffusion regime at high Peclet number.
authors.affiliation: Departamento de Fisica, Universidade Federal do Ceara, 60451-970 Fortaleza, Ceara, Brazil and Schlumberger-Doll Research, Old Quarry Road, Ridgefield, Connecticut 06877 and Center for Polymer Studies and Physics Department, Boston University, Bos.
authors.initials: HA
authors.lastname: Makse
authors.initials: JS
authors.lastname: Andrade
authors.lastname: Eugene Stanley H