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Title: Convection in three-dimensional vibrofluidized granular beds
Authors: Viswanathan, Harish
Sheikh, Nadeem A.
Wildman, Ricky D.
Huntley, Jonathan M.
Keywords: Fluidized beds
Granular media
Kinetic theory
Issue Date: 2011
Publisher: © Cambridge University Press
Citation: VISWANATHAN, H. ... et al., 2011. Convection in three-dimensional vibrofluidized granular beds. Journal of Fluid Mechanics, 682, pp. 185 - 212.
Abstract: We study convective motion in vertically vibrated three-dimensional granular beds by comparing the predictions of a model based on a hydrodynamic description to Navier–Stokes order with experimental results obtained using positron emission particle tracking (PEPT). The three-dimensional conservation equations relating mass, momentum and energy are solved using the finite element (FE) method for a viscous vibrofluidized bed by using only observable system parameters such as particle number, size, mass and coefficients of restitution. The mean velocity profiles from the viscous model show reasonable agreement with the experimental results at relatively low altitudes for the range of experimental values studied, though the velocity fields at higher altitudes were systematically underestimated by the model. We confirm that the convection rolls are influenced by the sidewall coefficient of restitution and demonstrate the scaling relationships that operate, where increasing amplitude of vibration leads to a reduction in the angular velocity of the rolls.
Description: This article was published in the Journal of Fluid Mechanics [© Cambridge University Press] and is available online at http://journals.cambridge.org/
Version: Published
DOI: 10.1017/jfm.2011.209
URI: https://dspace.lboro.ac.uk/2134/13246
Publisher Link: http://dx.doi.org/10.1017/jfm.2011.209
ISSN: 0022-1120
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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