Fibrous random materials: From microstructure to macroscopic properties

K. Yazdchi, S. Luding

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    1 Citation (Scopus)
    5 Downloads (Pure)

    Abstract

    Fibrous porous materials are involved in a wide range of applications including composite materials, fuel cells, heat exchangers and (biological)filters. Fluid flow through these materials plays an important role in many engineering applications and processes, such as textiles and paper manufacturing or transport of (under)ground water and pollutants. While most porous materials have complex geometry, some can be seen as two-dimensional particulate/fibrous systems, in which we introduce several microscopic quantities, based on Voronoi and Delaunay tessellations, to characterize their microstructure. In particular, by analyzing the topological properties of Voronoi polygons, we observe a smooth transition from disorder to order, for increasing packing fraction. Using fully resolved finite element (FE) simulations of Newtonian, incompressible fluid flow perpendicular to the fibres, the macroscopic permeability is calculated in creeping flow regimes. The effect of fibre arrangement and local crystalline regions on the macroscopic permeability is discussed and the macroscopic property is linked to the microscopic structural quantities.
    Original languageEnglish
    Title of host publicationPowders and Grains 2013
    Subtitle of host publicationProceedings of the 7th International Conference on Micromechanics of Granular Media
    EditorsAibing Yu, Kejun Dong, Runyu Yang, Stefan Luding
    PublisherAIP Publishing LLC
    Pages1142-1145
    ISBN (Print)978-0-7354-1166-1
    DOIs
    Publication statusPublished - 8 Jul 2013
    Event7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013 - Sydney, Australia
    Duration: 8 Jul 201312 Jul 2013
    Conference number: 7
    http://www.pg2013.unsw.edu.au/

    Publication series

    NameAIP Conference Proceedings
    PublisherAIP Publishing LLC
    Volume1542
    ISSN (Print)0094-243X
    ISSN (Electronic)1551-7616

    Conference

    Conference7th International Conference on Micromechanics of Granular Media, Powders and Grains 2013
    Abbreviated titlePowders & Grains
    CountryAustralia
    CitySydney
    Period8/07/1312/07/13
    Internet address

    Keywords

    • FEM
    • Delaunay triangulation
    • Transport properties
    • Microstructure
    • Porous media
    • Permeability

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