A DEM study of bubble formation in Group B fluidized beds with and without cohesive inter-particle forces

Jai Kant Pandit, Xiao Shan Wang, Martin John Rhodes

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Abstract

This paper presents a 2D soft-sphere discrete element method (DEM) simulation study of bubble formation in fluidized beds of Geldart Group B powders with and without externally imposed cohesive interparticle force. The effect of interparticle force on bubble formation and bubble characteristics is studied by inducing a single bubble at the centre of the distributor of a 2D bed that contains 36000 mono-sized particles having a diameter of 500 mu m and density of 1000 kg m(-3). It is observed that in the presence of externally imposed cohesive interparticle force, the bubble formation process not only requires a higher air velocity for its initiation, but it is also slower when compared to the case with no interparticle force. (c) 2006 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)159 - 166
Number of pages8
JournalChemical Engineering Science
Volume62
Issue number1-2
DOIs
Publication statusPublished - 2007

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