Effect of vibration condition and inter-particle frictions on the packing of uniform spheres

Xizhong An, Runyu Yang, Ruiping Zou, Aibing Yu

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60 Citations (Scopus)


We present a numerical study of the packing of uniform spheres under three-dimensional vibration using the discrete element method (DEM), focusing on the effects of vibration condition (amplitude and frequency) and inter-particle frictions (sliding and rolling frictions). The results are analysed in terms of packing density, coordination number (CN), radial distribution function (RDF) and pore structure. It is shown that increasing either the vibration amplitude or frequency causes packing density to increase initially to a maximum and then decrease. Both vibration frequency and amplitude should be considered to characterize the effect of vibration process on packing structure. The sliding and rolling frictions between particles can decrease packing density since they dissipate energy, although the effect of rolling friction is less significant. In line with the change of packing density, microstructural properties such as CN, RDF and pore distribution also change: a looser packing often corresponds to smaller CN, less peaked RDF and larger but more widely distributed pores.
Original languageEnglish
Pages (from-to)102 - 109
Number of pages8
JournalPowder Technology
Issue number2
Publication statusPublished - 2008
Externally publishedYes

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