14-17 May 2018
New Orleans
US/Central timezone

Diffusive processes across frictional patterns

16 May 2018, 17:30
15m
New Orleans

New Orleans

Poster MS 3.10: From deformable porous media to frictional fluids Poster 3

Speaker

Dr Guillaume Dumazer (University of Oslo, Porous Media Laboratory)

Description

The progress of the interface between an invasive fluid and a defending mixture of granular material together with a second fluid, immiscible with the invading phase, has recently been used to form complex patterns in both Hele-Shaw cells or millifluidic confinements. These are the result of the deformation of a confined porous material, made of an homogeneous granular phase, into an heterogeneous structure exhibiting various sizes and permeabilities at different scales. A labyrinthine pattern can then be obtained after the withdraw of a liquid phase containing glass beads and confined in an horizontal Hele-Shaw cell, see Knudsen et al., PRE 77, 021301 (2008). What are then the transport properties within such a geometrical structure? The geometrical constraints with dead-ends are limiting the transport of diffusing species from a central entry point towards the edges of the labyrinth. A transient subdiffusive transport can be obtained over a time scale determined by the wavelength of the pattern.

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Primary authors

Mr Kristian Oslen (University of Oslo, Porous Media Laboratory) Dr Guillaume Dumazer (University of Oslo, Porous Media Laboratory) Prof. Eirik Flekkøy (University of Oslo, Porous Media Laboratory)

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