Documents disponibles écrits par cet auteur

Computational fluid dynamics study of pulverized coal combustion in blast furnace raceway / Y. S. Shen in Industrial & engineering chemistry research, Vol. 48 N° 23 (Décembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10314–10323 Titre : Computational fluid dynamics study of pulverized coal combustion in blast furnace raceway Type de document : texte imprimé Auteurs : Y. S. Shen, Auteur ; D. Maldonado, Auteur ; B.Y. Guo, Auteur Année de publication : 2010 Article en page(s) : pp. 10314–10323 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Computational--Fluid  Dynamics--Pulverized--Coal--Combustion--Blast  Furnace--Raceway Résumé : In this work, a numerical model is used to study the flow and coal combustion along the coal plume in a large-scale setting simulating the lance−blowpipe−tuyere−raceway region of a blast furnace. The model formulation is validated against the measurements in terms of burnout for both low and high volatile coals. The typical phenomena related to coal combustion along the coal plume are simulated and analyzed. The effects of some operational parameters on combustion behavior are also investigated. The results indicate that oxygen as a cooling gas gives a higher coal burnout than methane and air. The underlying mechanism of coal combustion is explored. It is shown that under the conditions examined, coal burnout strongly depends on the availability of oxygen and residence time. Moreover, the influences of two related issues, i.e. the treatment of volatile matter (VM) and geometric setting in modeling, are investigated. The results show that the predictions of final burnouts using three different VM treatments are just slightly different, but all comparable to the measurements. However, the influence of the geometric setting is not negligible when numerically examining the combustion of pulverized coal under blast furnace conditions. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900853d [article] Computational fluid dynamics study of pulverized coal combustion in blast furnace raceway [texte imprimé] / Y. S. Shen, Auteur ; D. Maldonado, Auteur ; B.Y. Guo, Auteur . - 2010 . - pp. 10314–10323. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 23 (Décembre 2009) . - pp. 10314–10323 Mots-clés : Computational--Fluid  Dynamics--Pulverized--Coal--Combustion--Blast  Furnace--Raceway Résumé : In this work, a numerical model is used to study the flow and coal combustion along the coal plume in a large-scale setting simulating the lance−blowpipe−tuyere−raceway region of a blast furnace. The model formulation is validated against the measurements in terms of burnout for both low and high volatile coals. The typical phenomena related to coal combustion along the coal plume are simulated and analyzed. The effects of some operational parameters on combustion behavior are also investigated. The results indicate that oxygen as a cooling gas gives a higher coal burnout than methane and air. The underlying mechanism of coal combustion is explored. It is shown that under the conditions examined, coal burnout strongly depends on the availability of oxygen and residence time. Moreover, the influences of two related issues, i.e. the treatment of volatile matter (VM) and geometric setting in modeling, are investigated. The results show that the predictions of final burnouts using three different VM treatments are just slightly different, but all comparable to the measurements. However, the influence of the geometric setting is not negligible when numerically examining the combustion of pulverized coal under blast furnace conditions. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900853d

Effect of slurry properties on particle motion in IsaMills / C.T. Jayasundara in Minerals engineering, Vol. 22 N° 11 (Octobre 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 11 (Octobre 2009) . - pp. 886–892 Titre : Effect of slurry properties on particle motion in IsaMills Type de document : texte imprimé Auteurs : C.T. Jayasundara, Auteur ; R.Y. Yang, Auteur ; B.Y. Guo, Auteur Année de publication : 2009 Article en page(s) : pp. 886–892 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Mineral  processing  Discrete  element  method  Computational  fluid  dynamics  IsaMill™  Stirred  mill Résumé : IsaMill™ is a high-speed stirred mill for a range of milling duties from ultra-fine to relatively coarse grinding in the mineral processing industry. This work investigated particle and slurry flow in a mill using a combined Discrete Element Method and Computational Fluid Dynamics (DEM-CFD) approach. Slurry properties, such as flow density and viscosity, were varied to study their effects on the flow properties in terms of flow velocity, power draw, collision frequency, collision energy and total impact energy. Significant differences were observed when slurry was introduced and other conditions unchanged. With increasing density, fluid and particle flows showed stronger circulation in the axial direction due to the larger drag forces. Increased relative velocity and interaction between particles with disc led to higher collision frequency and collision energy. Increase in flow viscosity limited particles from moving towards the outer wall and the particles were more dispersed due to the larger circulating velocity in the axial direction. The total impact energy of the media and power draw also increase with slurry density and viscosity. The developed model provides a useful framework for further analysis of particle–slurry interactions in IsaMills™. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509001162 [article] Effect of slurry properties on particle motion in IsaMills [texte imprimé] / C.T. Jayasundara, Auteur ; R.Y. Yang, Auteur ; B.Y. Guo, Auteur . - 2009 . - pp. 886–892. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 11 (Octobre 2009) . - pp. 886–892 Mots-clés : Mineral  processing  Discrete  element  method  Computational  fluid  dynamics  IsaMill™  Stirred  mill Résumé : IsaMill™ is a high-speed stirred mill for a range of milling duties from ultra-fine to relatively coarse grinding in the mineral processing industry. This work investigated particle and slurry flow in a mill using a combined Discrete Element Method and Computational Fluid Dynamics (DEM-CFD) approach. Slurry properties, such as flow density and viscosity, were varied to study their effects on the flow properties in terms of flow velocity, power draw, collision frequency, collision energy and total impact energy. Significant differences were observed when slurry was introduced and other conditions unchanged. With increasing density, fluid and particle flows showed stronger circulation in the axial direction due to the larger drag forces. Increased relative velocity and interaction between particles with disc led to higher collision frequency and collision energy. Increase in flow viscosity limited particles from moving towards the outer wall and the particles were more dispersed due to the larger circulating velocity in the axial direction. The total impact energy of the media and power draw also increase with slurry density and viscosity. The developed model provides a useful framework for further analysis of particle–slurry interactions in IsaMills™. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687509001162

A numerical model for the liquid flow in a sputnik coal distributor / B.Y. Guo in Minerals engineering, Vol. 22 N° 1 (Janvier 2009) 

Public ISBD [article]  in Minerals engineering > Vol. 22 N° 1 (Janvier 2009) . - pp. 78–87 Titre : A numerical model for the liquid flow in a sputnik coal distributor Type de document : texte imprimé Auteurs : B.Y. Guo, Auteur ; K. J. Dong, Auteur ; K. W. Chu, Auteur Année de publication : 2009 Article en page(s) : pp. 78–87 Note générale : Génie Minier Langues : Anglais (eng) Mots-clés : Coal  preparation  Coal  distributor  Fluid  flow  Numerical  modeling  Computational  fluid  dynamics Index. décimale : 622 Industrie minière Résumé : Sputnik coal distributors are widely applied in coal separation plants and biased outputs are frequently encountered. The present paper aims to develop a numerical model for simulating the flow of the carrier liquid within a distributor chamber. The model uses simple homogeneous multi-phase flow model and performs well in terms of successfully predicting the important phenomena within the distributor chamber, such as the strong vortex in the upper chamber and channeling through the slots on the orifice plate, as observed experimentally. The model provides necessary information for particle flow modeling and offers a useful tool to trouble-shooting of operations and optimization of design for such type of devices. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001088 [article] A numerical model for the liquid flow in a sputnik coal distributor [texte imprimé] / B.Y. Guo, Auteur ; K. J. Dong, Auteur ; K. W. Chu, Auteur . - 2009 . - pp. 78–87. Génie Minier Langues : Anglais (eng) in Minerals engineering > Vol. 22 N° 1 (Janvier 2009) . - pp. 78–87 Mots-clés : Coal  preparation  Coal  distributor  Fluid  flow  Numerical  modeling  Computational  fluid  dynamics Index. décimale : 622 Industrie minière Résumé : Sputnik coal distributors are widely applied in coal separation plants and biased outputs are frequently encountered. The present paper aims to develop a numerical model for simulating the flow of the carrier liquid within a distributor chamber. The model uses simple homogeneous multi-phase flow model and performs well in terms of successfully predicting the important phenomena within the distributor chamber, such as the strong vortex in the upper chamber and channeling through the slots on the orifice plate, as observed experimentally. The model provides necessary information for particle flow modeling and offers a useful tool to trouble-shooting of operations and optimization of design for such type of devices. DEWEY : 622 ISSN : 0892-6875 En ligne : http://www.sciencedirect.com/science/article/pii/S0892687508001088