A comparative hydrodynamic study of two types of spouted bed reactor designs

Salam, P. Abdul; Bhattacharya, S.C.

doi:10.1016/j.ces.2005.10.044

Cited by 19 publications

(15 citation statements)

References 26 publications

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“…The spouted bed was originally described by Mathur and Gishler (1955), arising as an alternative to fluidized beds for handling coarse particles. Since then, spouted beds have been widely applied in several physical and chemical operations, such as drying (Jenkins et al, 2002; Benali and Amazous, 2006), coating (Jono et al, 2000; Ichikawa et al, 2003), carbonization (Rasul, 2001; Salam and Bhattacharya, 2006), and pyrolysis (Aguado et al, 2003). The main characteristic of this system is a constant moving of solid phase and high contact solid‐fluid inside the bed, that promote good mixing between phases and consequently high rates of mass and heat transfer.…”

Section: Introductionmentioning

confidence: 99%

“…To properly design a spouted bed the fluid and solid dynamic must be well understood due to the strong influence that both dynamics have on its performance. Many empirical and semi‐empirical equations based on small‐scale vessels, with column diameter ( D c ) up to 0.3 m, are available in the literature for predicting some general fluid dynamics properties of this system, as minimum spout velocity (Salam and Bhattacharya, 2006) or stable pressure drop (Olazar et al, 1994). In recent years, several experimental studies concerning the fluidynamic behaviour of spouted beds have been performed.…”

Section: Introductionmentioning

confidence: 99%

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CFD modelling of a semi‐cylindrical spouted bed: Numerical simulation and experimental verification

et al. 2009

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It is well known that a special attention is necessary to infer process information of a spouted bed at full-column using data from semi-cylindrical vessels. In this work experimental data are obtained from a semi-cylindrical spouted bed for comparison with CFD simulations performed using a 3D simulation scheme. The purpose of this paper is to contribute on the discussing about the influence of the flat wall in the solid behaviour inside the semi-cylindrical vessel by comparing numerical results with experimental data. Simulated results of fountain height, spout diameter and particle velocities inside the bed are compared with image data obtained from a semi-cylindrical column. The simulations were accomplished using the commercial package FLUENT 6.3.26.Il est bien connu qu'une attention particulière est nécessaire pour déduire des informationsà partir d'un lit jaillissantà colonne complèteà l'aide de données venant de réservoirs semi-cylindriques. Dans ce travail, des données expérimentales sont obtenuesà partir d'un lit jaillissant hémicylindriqueà des fins de comparaison avec des simulations de CFD menées au moyen d'un schéma de simulation en 3-D. Le but de cet article est de contribuerà la discussion sur l'influence de la paroi plate dans le comportement des solidesà l'intérieur du réservoir hémicylindrique en comparant les résultats numériques aux données expérimentales. Les résultats simulés de la hauteur de fontaine, du diamètre de jet et des vitesses de particules dans le lit sont comparés aux données d'imagerie obtenuesà partir d'une colonne hémicylindrique. Les simulations ontété effectuéesà l'aide du logiciel commercial FLUENT 6.3.26.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CFD modelling of a semi‐cylindrical spouted bed: Numerical simulation and experimental verification

et al. 2009

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“…This alternative shows promising results when the relation between geometric factors and operating parameters is complex and difficult to describe as it is the case with U ms . Neural network models were also applied for the prediction of U ms for a central jet SB and a circular slit SB achieving more accurate results than those obtained from correlations [255]. A Back Projection (BP)-algorithm was also used to determine the degree of coffee roasting based on colour images [256].…”

Section: New Approaches: Neural Network Modellingmentioning

confidence: 99%

Modelling of Spouted and Spout-Fluid Beds: Key for Their Successful Scale Up

et al. 2017

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The development of robust mathematical models could provide the necessary tools for a more rapid, efficient, and reliable spouted bed technology development. Computer simulations can be very useful to aid this design and scale-up process: firstly, they can contribute to obtain a fundamental insight into their complex dynamic behavior by understanding the elementary physical principles such as drag, friction, dissipation etc.; secondly, the simulations can be used as a design tool where the ultimate goal is to have a numerical model with predictive capabilities for gas-particle flows at engineering scale. Clearly, one single simulation method will not be able to achieve this goal, but a hierarchy of methods modelling phenomena on different length and time scales can achieve this. The most fruitful approach will be when they are simultaneously followed, so that they can mutually benefit from each other. In this sense, this paper presents a review of the current state of the art of modelling on spouted and spout-fluid beds through an analysis of recent literature following a multiscale approach (molecular and particle, lab, plant and industrial scale). The main features of the different scales together with their current limits are discussed and specific topics are highlighted as paths that still need to be explored. In summary, the paper aims to define the theoretical setline and the basis of improvement that would lead to a robust multiscale model with solid links between micro and macroscopic phenomena. If done with the correct balance between accuracy and computational costs it will gear SB towards their reliable and successful implementation.

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“…The spouted bed was discovered by Mathur and Gishler (1955), arising as an alternative to fluidized beds for handling coarse particles. Since then, spouted beds are the subject of study for many researchers and they have been widely applied in several physical and chemical operations, such as drying (Jenkins et al, 2002; Benali and Amazous, 2006), coating (Jono et al, 2000; Ichikawa et al, 2003), carbonization (Rasul, 2001; Salam and Bhattacharya, 2006) and pyrolysis (Aguado et al, 2003). The main characteristic of this system is the constant moving of the solid phase and high contact solid–fluid inside the bed that promotes good mixing and consequently high rates of mass and heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Scale‐up study of spouted beds using computational fluid dynamics

2009

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This work presents a numerical study of the hydrodynamic of spouted beds using computational fluid dynamics (CFD) simulation. Scaling relationships proposed by He et al. [He et al., Chem. Eng. Sci. 1997;52:329-339] for spouted bed systems based on similitude method are numerically investigated using CFD simulation. In the present work it is verified that the spouted bed scale-up relationships of He et al. [He et al., Chem. Eng. Sci. 1997;52:329-339] produce good numerical results when all of the scale-up relationships are satisfied. It is also verified the behaviour of the numerical results when the scaling procedure is applied in a practical condition. In this case, the properties of fluid and solid are kept constant, which is a real situation of a scale-up procedure in a spouted bed used for drying of grains. In this work it is possible to verify that CFD simulation is a useful tool to evaluate similitude methods in spouted bed (multiphase flow) systems. The commercial package FLUENT 6.3.26 was used in all simulations.

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A comparative hydrodynamic study of two types of spouted bed reactor designs

Cited by 19 publications

References 26 publications

CFD modelling of a semi‐cylindrical spouted bed: Numerical simulation and experimental verification

CFD modelling of a semi‐cylindrical spouted bed: Numerical simulation and experimental verification

Modelling of Spouted and Spout-Fluid Beds: Key for Their Successful Scale Up

Scale‐up study of spouted beds using computational fluid dynamics

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