Particle dispersion in viscous three-phase inverse fluidized beds

Particle dispersion and fluctuations were investigated in a liquid–solid fluidised bed with viscous liquid media by employing the relaxation method based on the stochastic model. The bed expansion or contraction during the transient state was analysed by means of the histogram of pressure drop variation with elapsed time. The relaxation behaviour of the liquid–solid fluidised bed appeared to be heterogeneous followed by homogeneous expansion or contraction. Effects of liquid velocity (UL), particle size (dP), liquid viscosity (µL) and liquid holdup or bed porosity (εL) on the fluctuating frequency (F) and dispersion coefficient (DP) of fluidised solid particles were examined. The values of F and DP increased with an increase in dP but decreased with µL and exhibited local maxima with variations of UL and εL. The flow pattern of solid particles could be changed from uniform or pseudo‐homogeneous to turbulent random behaviour with an increase in the liquid velocity and liquid holdup or bed porosity. © 2012 Canadian Society for Chemical Engineering

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Particle dispersion and fluctuations in viscous liquid–solid fluidised Beds

Han

Lim

Kim

et al. 2012

Can J Chem Eng

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Heat transfer and bubble dynamics in a three-phase inverse fluidized bed

Myre

Macchi

2010

Chemical Engineering and Processing: Process Intensification

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Particle fluctuations and dispersion in three-phase fluidized beds with viscous and low surface tension media

Lim¹,

Seo²,

Kang³

et al. 2011

Chemical Engineering Science

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Particle dispersion in viscous three-phase inverse fluidized beds

Cited by 20 publications

References 20 publications

Particle dispersion and fluctuations in viscous liquid–solid fluidised Beds

Particle dispersion and fluctuations in viscous liquid–solid fluidised Beds

Heat transfer and bubble dynamics in a three-phase inverse fluidized bed

Particle fluctuations and dispersion in three-phase fluidized beds with viscous and low surface tension media

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