title: Characterisation of fluid flow through porous media using three-dimensional microimaging and pulsed gradient stimulated echo NMR.
abstract: Pulsed gradient stimulated echo (PGSTE) and microimaging nuclear magnetic resonance (NMR) are used to probe correlations between structure and flow in the void space of a model porous system formed from a packing of 1-mm diameter glass spheres. The pulsed gradient stimulated echo data determine the average propagator and permit the dispersion of the flow to be studied as a function of delay time. Microimaging yields structural information and, specifically, a reduced radial distribution function (rdf) for the structure of the void space. Transition to fully developed dispersive flow is shown to occur on a scale size for which no further correlations in the structure of the void space are observed.
authors.affiliation: Department of Chemical Engineering, University of Cambridge, UK.
authors.forename: B
authors.initials: B
authors.lastname: Manz
authors.forename: P
authors.initials: P
authors.lastname: Alexander
authors.forename: P B
authors.initials: PB
authors.lastname: Warren
authors.forename: L F
authors.initials: LF
authors.lastname: Gladden
mesh_terms: D005898:Glass; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D010316:Particle Size; D019047:Phantoms, Imaging; D016062:Porosity; D012212:Rheology