Kinetic Theory Approach

Gidaspow, Dimitri

doi:10.1016/b978-0-08-051226-6.50013-3

Cited by 127 publications

(253 citation statements)

References 17 publications

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“…Several researchers studied the influence of the drag model on the spouted bed hydrodynamics. Du et al (2005Du et al ( , 2006a applied the widely used drag models of Richardson and Zaki (1954), Gidaspow et al (1992), Di Felice (1994, Syamlal and O'Brien (1989), and Arastoopour et al (1990) in a CFD continuum model to investigate their influence on the hydrodynamics of a conical spouted bed containing either big particles (Du et al, 2006a) or small particles (Du et al, 2006b) and compared the results with experiments by He et al (1994a,b). They found out that different hydrodynamics are simulated in dependency of the drag models clarifying the strong impact of the gas-particle interaction on the overall flow structure in spouted beds.…”

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confidence: 98%

“…They found out that different hydrodynamics are simulated in dependency of the drag models clarifying the strong impact of the gas-particle interaction on the overall flow structure in spouted beds. The best fit with the experiments for both kinds of particles (big or small) was obtained with the Gidaspow et al (1992) drag model. The Gidaspow et al (1992) drag model has emerged as the most popular drag model in chemical engineering and many authors (Link et al, 2005;Zhonghua and Mujumdar, 2007;Diaz et al, 2008;Vieira et al, 2008) make use of it to simulate the gas-particle interaction.…”

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confidence: 99%

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CFD modeling of a prismatic spouted bed with two adjustable gas inlets

et al. 2009

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Since the invention of the spouted bed technology by Mathur and Gishler (1955), different kinds of apparatus design were developed and a huge number of applications in nearly all branches of industry have emerged. Modeling of spouted beds by means of modern simulation tools, like discrete particle models or continuum models, has become a precious opportunity to understand the complexity of multiphase flows in these apparatus. In this work, two-dimensional continuum simulations of a novel kind of spouted bed apparatus with adjustable gas inlets are presented. Different gas-particle drag models are used to obtain a realistic flow structure. Simulated solid phase concentrations are compared with images taken during experiments. Furthermore, simulated and measured gas phase pressure fluctuations over the entire bed are contrasted allowing more accurate comparisons between the simulated and the real hydrodynamic behaviour of the spouted bed.Depuis l'invention de la technologie du lit jaillissant par Mathur et Gishler (1955), une grande variété de systèmes aété mise au point et un nombre considérable d'applications dans presque toutes les branches de l'industrie ont vu le jour. La modélisation de lits jaillissants au moyen d'outils de simulation modernes, tels que les modèles de particules discrets ou les modèles en continu, est une excellente occasion pour comprendre la complexité desécoulements multiphasiques dans ces appareils. Dans ce travail, des simulations en continu bidimensionnelles d'une nouveau type de lit jaillissant avec des entrées de gaz ajustables sont présentées. On a testé différents modèles de traînée gaz-particules pour obtenir une structure d'écoulement réaliste. Les concentrations de phases solides simulées sont comparéesà des images prises lors des expériences. Par ailleurs, les fluctuations de pression de phase gazeuse simulées et mesurées dans la totalité du lit sont contrastées, ce qui permet des comparaisons plus précises entre le comportement hydrodynamique simulé et réel du lit jaillissant.

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CFD modeling of a prismatic spouted bed with two adjustable gas inlets

et al. 2009

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“…Figure 4 presents the (heterogeneous) distribution functions of the sorbent volume fraction for the two operating conditions shown in Figure 3(b). In this study, we investigate the dependence of sorbent distribution function for two input operating conditions: the particle diameter d p (expressed in micro metres, µm), and the scaled velocity v g /u mf of gas injected at the bottom inlet (dimensionless, scaled by a characteristic velocity scale u mf ; see Gidaspow (1994)). …”

Section: -Input and 2-output Examplementioning

confidence: 99%

Bayesian Treed Multivariate Gaussian Process With Adaptive Design: Application to a Carbon Capture Unit

Konomi¹,

Karagiannis²,

Sarkar³

et al. 2014

Technometrics

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“…In literature different expressions for the solids shear viscosity can be found. In this work the approach of Gidaspow et al 23 is used, because this approach is validated by comparison with measured data…”

Section: Governing Equationsmentioning

confidence: 99%

Derivation, simulation and validation of a cohesive particle flow CFD model

Wachem

Sasic

2007

AIChE Journal

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A comprehensive physical model describing the agglomeration behavior present during fluidization of fine powders is still missing in literature. A model of balance of forces acting on a single solid particle is introduced, aiming at predicting and locally estimating the size of the agglomerates created in the bed. Computational fluid dynamics (CFD) have been used to investigate the hydrodynamics of a gas-solid fluidized bed operated with particles belonging to group A of Geldart classification.1 The key issue is that, in the gas and particle flow field, both hydrodynamic and interparticle forces are of importance. The model is incorporated into simulations based on an Eulerian approach and using the kinetic theory of granular flow. In the simulations, the closure models describing the hydrodynamics of the solids phase are directly affected by the behavior of the agglomerates. No empirical data or parameters were used to close the model. The simulations are compared with experiments of an independent research group, through the time-averaged solids volume fraction in a fluidized bed operated at different gas velocities. The agreement obtained between the simulation results and data from the literature is very good. Also, it is shown that, under flow conditions treated in this work, agglomerates of size of several single particle diameters are present in the fluidized bed.

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Kinetic Theory Approach

Cited by 127 publications

References 17 publications

CFD modeling of a prismatic spouted bed with two adjustable gas inlets

CFD modeling of a prismatic spouted bed with two adjustable gas inlets

Bayesian Treed Multivariate Gaussian Process With Adaptive Design: Application to a Carbon Capture Unit

Derivation, simulation and validation of a cohesive particle flow CFD model

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