Bubbles and solid structures in a vibrated bed of granular materials

Piroz Zamankhan

Physica A: Statistical Mechanics and its Applications, 2011, vol. 390, issue 8, 1402-1416

Abstract: Modern graphics processing units (GPUs) are able to perform high-precision simulations for scientific applications. As a demonstration example, large-scale, three-dimensional computer simulations were performed on a single GPU to produce bubbles and solid structures in a tiny, annular container, partially filled with a granular material, shaken vertically. The dynamics of the gas above and within the shaken granular material was solved using large-eddy simulations (LES) while the grains were treated with molecular dynamics. A feature of the results is that bubbles form when peak acceleration relative to gravity exceeds a critical value Γb. This is in qualitative agreement with experiments [H.P. Pak, P.R. Behringer, Nature 371 (1994) 231]. An interesting finding is that Γbfor glass particles depends primarily on the coefficient of friction,μ, as well as on the coefficients which characterize the viscoelastic response of the granular material.

Keywords: Gas particle flows; Gas bubbles; Dense slowly evolving granular systems; GPU computing; Large eddy simulation; Friction; Fractals (search for similar items in EconPapers)
Date: 2011
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:390:y:2011:i:8:p:1402-1416

DOI: 10.1016/j.physa.2010.11.039

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