Experimental And Computational Study Of
Pressure Drop And Void Fraction
In A Bubbling Fluidized Bed.
Author(s)
C. K. Jayarathna & B. M. Halvorsen
Abstract
The aim of this work is to study flow behaviour in a fluidized bed with different
mixtures of particles. Mathematical simulation is an alternative way to study the
fluidization behaviour. Experiments are performed in a cylindrical bed with a
uniform air distribution. Spherical glass particles with different mixtures of
particles are used in the experiments. The pressure and void fraction variations
are observed for two different powders and mixtures of the powders. The
commercial CFD code Fluent 6.3 is used for the corresponding simulations.
Eulerian-Eulerian model are used to simulate a multiphase bubbling fluidized
bed. The influence of particle size distribution on the bubble size, pressure and
void fraction variation along the bed has been investigated computationally. The
computational results are compared to the experimental data and the
discrepancies are discussed.
Keywords: fluidized bed, particle size distribution, pressure drop, CFD, fluent.
1 Introduction
Fluidized beds are widely used in industry because of good mixing and large
contact area between phases. It enhances the chemical reactions, heat transfer
and mass transfer. Liquid like behaviour of the bed particles are giving smooth
operation conditions and well mixed beds are obtaining isothermal properties,
hence the operation can be easily controlled.
Particle mixing in a fluidized bed is very much depending on bubble size
distribution and the particle characteristics [1]. The behaviour of particles in
Keywords
fluidized bed, particle size distribution, pressure drop, CFD, fluent
Related Book
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