Transport pathways within percolating pore space networks of granular materials

David M. Walker, A Tordesillas, K Vo

Research output: Chapter in Book/Conference paperConference paper

2 Citations (Scopus)

Abstract

Granular media can be regarded as a mixture of two components: grains and the material filling the voids or pores between the grains. Pore properties give rise to a range of applications such as modelling ground water flow, carbon capture and sequestration. The grains within a dense granular material respond to deformation (e.g., shearing or compression) by rearranging to create local zones of compression and zones of dilatation (i.e., regions of high pore space). Descriptions of the deformation are typically focused on analysis of the solid skeleton via topology of physical contact networks of grains but an
alternative perspective is to consider network representations of the evolving anisotropic pore space. We demonstrate how to construct pore space networks that express the local size of voids about a grain through network edge weights. We investigate sectors of the loading history when a percolating giant component of the pore space network exists. At these states the grains are in a configuration more prone to the efficient transport of material (e.g., fluid flow, mineral/gas deposits). These pathways can be found through examination of the weighted shortest paths percolating the boundaries of the material. In particular,
network weights biased towards large void space results in efficient percolating pathways traversing the shear band in the direction of principal stress within a 2D granular assembly subject to high strains.
Original languageEnglish
Title of host publicationPowders and Grains 2013
Subtitle of host publicationProceedings of the 7th International Conference on Micromechanics of Granular Media
Place of PublicationNew York
PublisherAmerican Institute of Physics
Pages551-554
Number of pages4
Volume1542
ISBN (Print)9780735411661
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventPOWDERS AND GRAINS 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media - Sydney, Australia, Sydney, Australia
Duration: 8 Jul 201312 Jul 2013

Conference

ConferencePOWDERS AND GRAINS 2013: Proceedings of the 7th International Conference on Micromechanics of Granular Media
CountryAustralia
CitySydney
Period8/07/1312/07/13

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