Hydrodynamics Behaviour Of Slot-rectangular
Spouted Beds: Assessment Of Slot Width Effect
Author(s)
E. Esmaili, N. Mahinpey & C. J. Lim
Abstract
Spouted beds, originally invented in Canada (1955), have been widely used in
drying, granulation, catalytic polymerization, residue treatment and coating of
several materials. Understanding of gas and particle hydrodynamics behavior in
a slot-rectangular spouted bed is important for evaluation of particle circulation
rate and gas-solid contact efficiency and also for overcoming scale-up
difficulties. Although have been extensively applied, the mechanisms of solid
movement in spouted beds are still not completely understood. In this research,
computational fluid dynamics (FLUENT 6.3) has been used to perform a
complete study on the hydrodynamic behavior of spouted bed using an Eulerian-
Eulerial two-phase model. The Eulerian model assumes that both phases can be
considered as fluid and also take the interpenetrating effect of each phase into
consideration by using inter-phase drag models. The computational work has
been significantly reduced using a 2D axisymmetric mesh for the bed, operating
at different conditions (i.e. different superficial gas velocities, static bed heights,
size of particle). Furthermore, the effect of slot width on the hydrodynamic
behavior of the bed has been predicted. The results predicted by numerical
simulation have been validated with the earlier experiments conducted. The
comparisons have been made in terms of fountain height for various operating
conditions. The results show a good agreement between the experimental data
and the numerical simulation.
Keywords: spouted beds, slot-rectangular, computational fluid dynamics,
FLUENT.
Keywords
spouted beds, slot-rectangular, computational fluid dynamics,
FLUENT
Related Book
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