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The effect of column tilt on flow homogeneity and particle agitation in a liquid fluidized bed

Aguilar-Corona, Alicia and Masbernat, Olivier and Figueroa-Espinoza, Bernardo and Zenit, Roberto The effect of column tilt on flow homogeneity and particle agitation in a liquid fluidized bed. (2017) International Journal of Multiphase Flow, 92. 50-60. ISSN 0301-9322

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Official URL: http://doi.org/10.1016/j.ijmultiphaseflow.2017.02.008

Abstract

The motion of particles in a solid-liquid fluidized bed was experimentally studied by video tracking of marked particles in a matched refractive index medium. In this study, two fluidized states are compared, one carefully aligned in the vertical direction ensuring a homogeneous fluidisation and another one with a non-homogeneous fluidisation regime that results from a slight tilt of the fluidisation column of 0.3° with respect to the vertical. As a result of the misalignment, large recirculation loops develop within the bed in a well-defined spatial region. It is found that in that range of solid fraction (between 0.3 and 0.4), the inhomogeneous motion of the particles leads to significant differences in velocity fluctuations as well as in self-diffusion coefficient of the particles in the vertical direction, whereas the fluidisation height remains unaffected. At lower (less than 0.2) or higher (higher than 0.5) concentration, particle agitation characteristics are almost unchanged in the vertical direction.

Item Type:Article
HAL Id:hal-01897401
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Universidad Nacional Autónoma de México - UNAM (MEXICO)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Universidad Michoacana de San Nicolas de Hidalgo - UMSNH (MEXICO)
Laboratory name:
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Deposited By: Loetitia MOYA
Deposited On:17 Oct 2018 08:37

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