Numerical simulation of a spouted bed with a draft tube with and without liquid spray

Li, Tingwen; Pougatch, Konstantin; Salcudean, M.; Grecov, Dana

doi:10.1002/cjce.20161

Cited by 7 publications

(3 citation statements)

References 43 publications

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“…Literature study reveals that comparatively extensive work has been reported in the field of momentum transfer, whereas limited information is available on heat and mass transfer aspects with liquid injection. [9] performed Eulerian-Eulerian simulations to study the dynamics of gas-solid spouted bed with a draft tube and liquid injection, and compared their results with experiments. [10] studied the particulate flow behaviour in spout fluidized beds for two flow regimes by using an extended CFD-DEM embedding a variable restitution coefficient based on the moisture content with liquid evaporation.…”

Section: Introductionmentioning

confidence: 99%

CFD–DEM model for coupled heat and mass transfer in a spout fluidized bed with liquid injection

Sutkar

Deen

Patil

et al. 2016

Chemical Engineering Journal

102

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Section: Introductionmentioning

confidence: 99%

CFD–DEM model for coupled heat and mass transfer in a spout fluidized bed with liquid injection

Sutkar

Deen

Patil

et al. 2016

Chemical Engineering Journal

102

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“…The researchers obtained detailed distribution profiles of flow properties and compared some average values to the experimental data. A somewhat similar problem was modelled by Li et al (2008). However, they used a Eulerian approach for all three phases.…”

Section: Introductionmentioning

confidence: 72%

Numerical simulation of liquid spray dispersion in a fluidized bed

Pougatch

Salcudean

2010

Can J Chem Eng

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A numerical model that simulates liquid spray dispersion in the fluidized bed of solid particles is presented. The model includes flow through the atomization device (nozzle), phase inversion and formation of the spray, its interaction with the solid particles, and liquid propagation within the bed. All these processes are modelled simultaneously to reflect the couplings existing between them. The model utilises a Eulerian description for all three phases to allow for the continuous computations throughout the whole domain. The comparison with experimental data reveals reasonably good agreement between the predicted and measured liquid to solid mass ratio distributions. Un modèle numérique qui simule la vaporization de liquide dans le lit fluidisé de particules solides est présenté. Ce modèle comprend la circulation dans l'appareil de pulvérization (buse), l'inversion de phase et la formation de la vaporization, son interaction avec les particules solides et la propagation liquide dans le lit. Tous ces procédés sont modelés de manière simultanée pour refléter les associations qui existent entre eux. Le modèle utilise une description eulérienne pour les trois phases afin de permettre les calculs continus dans l'ensemble du domaine. La comparaison avec les données expérimentales révèle que les distributions de rapport de masse liquideà solide prévues et mesurées sont raisonnablement en accord.

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“…Instead it depends on the impact velocity, and is said to approach unity when the impact velocity approaches zero 40. In numerical simulations, this parameter is treated as a constant and usually set in the range 0.9–0.995 31, 41–47. Although the influence of restitution coefficient has often been studied, it was still deemed to be necessary to perform a sensitivity analysis for this parameter as no information has been reported on its influence on gas mixing.…”

Section: Resultsmentioning

confidence: 99%

Numerical investigation of gas mixing in gas‐solid fluidized beds

Zhang

Grace

et al. 2010

AIChE Journal

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Gas mixing in a tall narrow fluidized bed operated in the slugging fluidization regime is simulated with the aid of computational fluid dynamics. In the first part, a parametric study is conducted to investigate the influence of various parameters on the gas mixing. Among the parameters studied, the specularity coefficient for the partialslip solid-phase wall boundary condition had the most significant effect on gas mixing. It was found that the solid-phase wall boundary condition needs to be specified with great care when gas mixing is modeled, with free slip, partial slip and no-slip wall boundary conditions giving substantial differences in the extent of gas back mixing. Axial and radial tracer concentration profiles for different operating conditions are generally in good agreement with experimental data from the literature. Detailed analyses of tracer back mixing are carried out in the second part. Two parameters, the tracer backflow fraction and overall gas backflow fraction, in addition to axial profiles of cross-sectional averaged tracer concentrations, are evaluated for different flow conditions. Qualitative trends are consistent with reported experimental findings.

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Numerical simulation of a spouted bed with a draft tube with and without liquid spray

Cited by 7 publications

References 43 publications

CFD–DEM model for coupled heat and mass transfer in a spout fluidized bed with liquid injection

CFD–DEM model for coupled heat and mass transfer in a spout fluidized bed with liquid injection

Numerical simulation of liquid spray dispersion in a fluidized bed

Numerical investigation of gas mixing in gas‐solid fluidized beds

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