On a eulerian and lagrangian combined model in dense particle-laden riser flow

A new numerical model using both Eulerian and Lagrangian coordinates, and taking account of interparticle interactions, has been developed for the study of hydrodynamic aspects of dense particle‐laden rise flows. A stochastic particle dispersion model has been incorporated in the original model to d...

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Veröffentlicht in:Canadian journal of chemical engineering 1999-12, Vol.77 (6), p.1113-1120
Hauptverfasser: Fan, Jianren, Sun, Ping, Ma, Yinliang, Cen, Kefa
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container_title Canadian journal of chemical engineering
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creator Fan, Jianren
Sun, Ping
Ma, Yinliang
Cen, Kefa
description A new numerical model using both Eulerian and Lagrangian coordinates, and taking account of interparticle interactions, has been developed for the study of hydrodynamic aspects of dense particle‐laden rise flows. A stochastic particle dispersion model has been incorporated in the original model to describe the gas particle turbulent flows. In addition, the collisional interaction between the particles has been modeled using the kinetic theory of granular flows based on the Chapman‐Enskog theory of dense gases. A comparison with the experimental results of Miller and Gidspow (1992) shows reasonably good agreement. The present model may provide a useful approach for predicting the complex hydrodynamic behaviour of fluidized bed systems. Un nouveau modèle numérique utilisant à la fois des coordonnées eulériennes et lagrangiennes et tenant compte desinteractions entre les particules a été mis au point pour l'étude des aspects hydrodynamiques d'écoulements ascendants chargés de particules denses. Un modèle de dispersion de particules stochastique est introduit au modèle original afin de décrire les écoulements turbulents gaz‐particules. En outre, l'interaction collisionnelle entre les particules est modèlisée à l'aide de la théorie cinétique des écoulements granulaires reposant sur la théorie des gaz denses de Chapman‐Enskog. La comparaison avec les résultats expérimentaux de Miller et Gidsprow (1 992) montre un accord raisonnablement bon. Le modèle présent peut fournier une approche utile pour la prédiction du comportement hydrodynamique complexe des systèmes de lits fluidisés.
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J. Chem. Eng</addtitle><description>A new numerical model using both Eulerian and Lagrangian coordinates, and taking account of interparticle interactions, has been developed for the study of hydrodynamic aspects of dense particle‐laden rise flows. A stochastic particle dispersion model has been incorporated in the original model to describe the gas particle turbulent flows. In addition, the collisional interaction between the particles has been modeled using the kinetic theory of granular flows based on the Chapman‐Enskog theory of dense gases. A comparison with the experimental results of Miller and Gidspow (1992) shows reasonably good agreement. The present model may provide a useful approach for predicting the complex hydrodynamic behaviour of fluidized bed systems. 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J. Chem. Eng</addtitle><date>1999-12</date><risdate>1999</risdate><volume>77</volume><issue>6</issue><spage>1113</spage><epage>1120</epage><pages>1113-1120</pages><issn>0008-4034</issn><eissn>1939-019X</eissn><coden>CJCEA7</coden><abstract>A new numerical model using both Eulerian and Lagrangian coordinates, and taking account of interparticle interactions, has been developed for the study of hydrodynamic aspects of dense particle‐laden rise flows. A stochastic particle dispersion model has been incorporated in the original model to describe the gas particle turbulent flows. In addition, the collisional interaction between the particles has been modeled using the kinetic theory of granular flows based on the Chapman‐Enskog theory of dense gases. A comparison with the experimental results of Miller and Gidspow (1992) shows reasonably good agreement. The present model may provide a useful approach for predicting the complex hydrodynamic behaviour of fluidized bed systems. 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subjects Computational methods in fluid dynamics
dense particle-laden rise flows
Eulerian/Lagrangian approach
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
interparticle collision
Multiphase and particle-laden flows
Nonhomogeneous flows
Physics
title On a eulerian and lagrangian combined model in dense particle-laden riser flow
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