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Article
Numerical Simulations of the Effect of Conical Dimension on the Hydrodynamic Behaviour in Spouted Beds
Article first published online: 19 MAY 2008
DOI: 10.1002/cjce.5450820104
Copyright © 2004 Canadian Society for Chemical Engineering
1939-019X/asset/cover.gif?v=1&s=cfcc80a988824c9192ec5b18b35c3e2ec28d05b3 "The Canadian Journal of Chemical Engineering")
Additional Information
How to Cite
Yurong, H., Guangbo, Z., Bouillard, J. and Huilin, L. (2004), Numerical Simulations of the Effect of Conical Dimension on the Hydrodynamic Behaviour in Spouted Beds. Can. J. Chem. Eng., 82: 20–29. doi: 10.1002/cjce.5450820104
Publication History
- Issue published online: 19 MAY 2008
- Article first published online: 19 MAY 2008
- Manuscript Accepted: 16 DEC 2003
- Manuscript Revised: 1 OCT 2003
- Manuscript Received: 10 DEC 2002
- Abstract
- References
- Cited By
Keywords:
- gas-solid spouted bed;
- fluidization;
- numerical simulation
Abstract
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.
Les comportements d'écoulements gaz-solides dans des lits jaillissants ont été prédits à l'aide d'un modèle hydrodynamique d'écoulement gaz-solide dense. Des équations constitutives décrivant la pression et la viscosité des solides particulaires ont été introduites dans un programme informatique de simulation hydrodynamique. On a étudié de manière numérique l'effet des conditions opératoires (angle d'inclinaison et vitesse de jaillissement du gaz) sur la vitesse et la concentration des particules dans la région du bec, de l'espace annulaire et de la fontaine. Les vitesses verticale et horizontale des particules augmentent avec la vitesse de gaz jaillissant. Le diamètre du bec augmente avec la diminution de l'angle d'inclinaison. Lorsque l'angle d'inclinaison est supérieur à 60°, la section transversale du bec s'engorge, limitant ainsi l'écoulement ascendant des solides.