Frictional dependence of shallow-granular flows from discrete particle simulations

    Research output: Contribution to journalArticleAcademicpeer-review

    9 Citations (Scopus)
    20 Downloads (Pure)

    Abstract

    A shallow-layer model for granular flows is completed with a closure relation for the macroscopic bed friction or basal roughness obtained from micro-scale discrete particle simulations of steady flows. We systematically vary the bed friction by changing the contact friction coefficient between basal and flowing particles, while the base remains geometrically rough. By simulating steady uniform flow over a wide parameter range, we obtain a friction law that is a function of both flow and bed variables. Surprisingly, we find that the macroscopic bed friction is only weakly dependent on the contact friction of bed particles and predominantly determined by the properties of the flowing particles.
    Original languageEnglish
    Pages (from-to)127
    Number of pages6
    JournalEuropean physical journal E. Soft Matter
    Volume35
    Issue number12
    DOIs
    Publication statusPublished - 2012

    Keywords

    • EWI-22994
    • Flowing Matter: Granular Matter
    • Granular flow
    • Complex fluids and colloidal systems
    • Granular systems
    • Rheology
    • Avalanches
    • Granular solids

    Fingerprint Dive into the research topics of 'Frictional dependence of shallow-granular flows from discrete particle simulations'. Together they form a unique fingerprint.

    Cite this