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Publication - Professor David Muir Wood

    Characterization of artificial spherical particles for DEM validation studies


    Cavarretta, I, O'Sullivan, C, Ibraim, E, Lings, M, Hamlin, S & Wood, DM, 2012, ‘Characterization of artificial spherical particles for DEM validation studies’. Particuology, vol 10., pp. 209-220


    This paper describes a study in which advanced particle-scale characterization was carried
    out on spherical shaped particles that can be used in experimental tests to validate Discrete
    Element Method (DEM) simulations. Two types of particle, alkaline beads and borosilicate
    beads, which are manufactured from two different materials were considered. The particle
    shapes, stiffnesses, contact friction properties and surface roughnesses were measured. The
    influences of hardness and roughness on the mechanical response of the particles were
    carefully considered. In comparison with the alkaline beads, the borosilicate glass beads had
    more uniform sizes and were more spherical. They also exhibited mechanical characteristics
    that are closer to natural quartz sand. While consideration is restricted to only two material
    types here, the work has a broader implication, as a methodology for selecting particles
    suitable for use in DEM studies is outlined and the key parameters that should be considered
    in the selection process are highlighted.

    Full details in the University publications repository