Bubble–wall interaction for asymmetric injection of jets in solid–gas fluidized bed

Kumar, Apurv; Das, Subrat; Fabijanic, Daniel; Gao, Weimin; Hodgson, Peter

doi:10.1016/j.ces.2013.06.022

Cited by 5 publications

(1 citation statement)

References 29 publications

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“…Hernández-Jiménez et al developed a novel model and treated both the gas and the dense phase of the bed as continuum phases, whereas tracer particles were simulated as discrete entities namely fully coupled TFM-DEM simulations (Hernández-Jiménez et al, 2015). Researches have shown that the twofluid model is in good agreement with experimental results in simulating bubble generation and motion, particle fluctuation characteristics, and particle agglomeration in dilute fluidized beds (Kumar et al, 2013;Sun et al, 2011;Zi et al, 2017). Some researchers have also compared the TFM and DPM models results for Geldart B particles (Chen and Wang, 2014;Chiesa et al, 2005).…”

Section: Equations Of the Modelmentioning

confidence: 99%

Critical comparison of electrostatic effects on hydrodynamics and heat transfer in a bubbling fluidized bed with a central jet

Wang

Hernández-Jiménez

Lungu

et al. 2018

Chemical Engineering Science

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In many industrial process, electrostatic charges are inevitable. and affect the hydrodynamic behavior and heat transfer ability of chemical equipment. A comprehensive study of the electrostatic effect on bubble behavior, particle fluctuation velocity and heat transfer coefficient in the fluidized bed with a central jet has been evaluated in this paper by Eulerian-Eulerian two fluid model coupled with electrostatic model and energy model. The simulated voidage profiles at different positions, bubble detachment time and initial bubble diameter are compared with experiment results from the literature. The bubble behaviors including bubble frequency and bubble numbers, combined with particle fluctuation parameters are analyzed in both charged and uncharged system. Electrostatic effect on two kinds of heat transfer coefficients are quantitatively compared, namely bubble to emulsion phase heat transfers based on the gas throughflow velocity and gas solid local heat transfer. Simulation results show that electrostatic charges decrease bubble numbers and granular temperature, whereas the averaged heat transfer coefficients are enhanced. Overall, the electrostatic effect on the hydrodynamic and heat transfer characteristics can be revealed.

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