An experimental, theoretical and event-driven computational study of narrow vibrofluidised granular materials

Anthony Thornton, Kit Windows-Yule, David Parker, Stefan Luding

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    Abstract

    We review simulations, experiments and a theoretical treatment of vertically vibrated granular media. The systems considered are confined in narrow quasi-two-dimensional and quasi-one-dimensional (column) geometries, where the vertical extension of the container is much larger than one or both horizontal lengths. The additional geometric constraint present in the column setup frustrates the convection state that is normally observed in wider geometries. We start by showing that the Event Driven (ED) simulation method is able to accurately reproduce the previously experimentally determined phase-diagram for vibrofludised granular materials. We then review two papers that used ED simulations to study narrow quasi-one-dimensional systems revealing a new phenomenon: collective oscillations of the grains with a characteristic frequency that is much lower than the frequency of energy injection. Theoretical work was then undertaken that is able to accurately predict the frequency of such an oscillation and Positron Emission Particle Tracking (PEPT) experiments were undertaken to provide the first experimental evidence of this new phenomenon. Finally, we briefly discuss ongoing work to create an open-source version of this ED via its integration in the existing open-source package MercuryDPM (http://MercuryDPM.org); which has many advanced features that are not found in other codes.

    Original languageEnglish
    Article number15029
    JournalEPJ Web of Conferences
    Volume140
    DOIs
    Publication statusPublished - 30 Jun 2017
    Event8th International Conference on Micromechanics on Granular Media, Powders & Grains 2017 - Montpellier, France
    Duration: 3 Jul 20177 Jul 2017
    Conference number: 8
    http://pg2017.org/en/

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