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Numerical Simulations of the Effect of Conical Dimension on the Hydrodynamic Behaviour in Spouted Beds
Author(s) -
Yurong He,
Guangbo Zhao,
Bouillard Jacques,
Huilin Lu
Publication year - 2004
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450820104
Subject(s) - mechanics , annulus (botany) , conical surface , flow (mathematics) , viscosity , particle (ecology) , limiting , materials science , thermodynamics , physics , geology , engineering , mechanical engineering , composite material , oceanography
The flow behaviours of gas‐solids were predicted by means of a hydrodynamic model of dense gas‐solid flow in spouted beds. Constitutive equations describing the particulate solids pressure and viscosity were implemented into a hydrodynamic simulation computer program. The effect of operating conditions (inclined angle and gas spouting velocity) on particle velocity and concentration in the spout, annulus and fountain regions were numerical studied. Both vertical and horizontal particle velocities increased with increasing spouting gas velocity. The diameter of the spout increases with decreasing the inclination angle. As the inclination angle is set greater than 60°, the spout cross‐section starts becoming bottlenecked, limiting the upwards flow of solids.