title: Unexpected coupling between flow and adsorption in porous media.
abstract: We study the interplay between transport and adsorption in porous systems under a fluid flow, based on a lattice Boltzmann scheme extended to account for adsorption. We performed simulations on well-controlled geometries with slit and grooved pores, investigating the influence of adsorption and flow on dispersion coefficient and adsorbed density. In particular, we present a counterintuitive effect where fluid flow induces heterogeneity in the adsorbate, displacing the adsorption equilibrium towards downstream adsorption sites in grooves. We also present an improvement of the adsorption-extended lattice Boltzmann scheme by introducing the possibility for saturating Langmuir-like adsorption, while earlier work focused on linear adsorption phenomena. We then highlight the impact of this change in situations of high concentration of adsorbate.
authors.affiliation: École Normale Supérieure, PSL Research University, Département de Chimie, Sorbonne Universités - UPMC Univ Paris 06, CNRS UMR 8640 PASTEUR, 24 rue Lhomond, 75005 Paris, France. anne.boutin@ens.fr.
authors.forename: Jean-Mathieu
authors.initials: JM
authors.lastname: Vanson
authors.forename: François-Xavier
authors.initials: FX
authors.lastname: Coudert
authors.forename: Benjamin
authors.initials: B
authors.lastname: Rotenberg
authors.forename: Maximilien
authors.initials: M
authors.lastname: Levesque
authors.forename: Caroline
authors.initials: C
authors.lastname: Tardivat
authors.forename: Michaela
authors.initials: M
authors.lastname: Klotz
authors.forename: Anne
authors.initials: A
authors.lastname: Boutin