## Abstract A proper characterization of the hydrodynamics of binaryβsolid liquid fluidized beds is an important first step in its effective utilization. Of particular importance in this connection is to be able to predict the unique hydrodynamic phenomenon of the layerβinversion, which is associat
Modeling of multi-solid liquid fluidized bed
β Scribed by Dr. Mohammad Asif
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 480 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0930-7516
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β¦ Synopsis
Abstract
A dynamic model of the liquid fluidized bed containing two or more solid particle species of different size and density is presented. The model incorporates the particle mass transport mechanisms of the convection and the dispersion. The movement of the upper interface of the bed subject to a change in the liquid velocity is specified using the mass balance constraint. The particle velocities and dispersion coefficients are evaluated using correlations. The model is capable of describing the bed expansion, concentration profiles of the individual particle species, the bulk density profile, and the occurrence of layer inversion.
π SIMILAR VOLUMES
A simple predictive model is presented here to describe the layer inversion behaviour of binary solidΓliquid Γuidized beds. The model is based on the assumption that the concentrations of the two particle species in the binary bed when normalized with respect to their mono-component counterparts are
A new mechanism is proposed to interpret the phenomena observed in the liquid fluidization of the binary particle mixture. Two main factors, the bulk density and voidage fluctuation, are considered to determine the position of the layer of particles in the bed. The new model successfully explains th