Characterization and CFD-modeling of the hydrodynamics of a prismatic spouted bed apparatus

Gryczka, O.; Heinrich, Stefan; Deen, NG Niels; Annaland, van M Martin Sint; Kuipers, J.A.M.; Jacob, Michael; Mörl, Lothar

doi:10.1016/j.ces.2009.04.020

Cited by 80 publications

(46 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…TFM has been shown to be a viable approach to modeling dense particle, gas-particle systems, as long as the appropriate models are implemented correctly [9,[18][19][20][21][22][23][24][25][26][27][28][29]. Thus, TFM is expected to be a viable approach to predicting the interaction of a gas plume with a dense particle bed.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, TFM has been used extensively to model spouting and jet-fluidized beds, which is analogous to a jet impinging from below [9,[21][22][23][24][25][26][27][28][29]. However, for the case of a jet impinging downward onto a bed of particles, which is relevant to landing spacecraft, the motion of the particle phase was neglected and only the single-phase fluid (liquid or gas) was simulated.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Two-fluid modeling of cratering in a particle bed by a subsonic turbulent jet

LaMarche

Benavides-Morán

Wachem³

et al. 2017

Powder Technology

View full text Add to dashboard Cite

The Two-Fluid Method is capable of modeling large-scale (i.e., lab scale or larger) multiphase (particle-fluid) flows by treating both the fluid and particle phase as interpenetrating continua and solving mass and momentum balances for each phase. To solve for the flow of the solids phase the momentum balance requires constitutive relations in the form of normal and shear stresses ± i.e., pressures and viscosities. However, the stresses that account for frictional contacts in dense particle systems, and are relevant to this work, are empirically based. A study of the effects of adjusting the frictional model formulation (the empirical parameters of the model), by changing the overall frictional stress magnitude and the relative magnitude of the frictional viscosity to the frictional pressure, on the behavior of the bed is presented here. It was found that the magnitude of the frictional viscosity relative to the frictional pressure affects the crater growth prediction almost as much as the magnitude of the overall frictional stress. Additionally, a frictional model formulation is validated for sand particles, and predictions are compared with existing experimental data for the crater formation of a sand bed under a vertical, impinging jet of gas (Metzger et al. J Areo Eng (2008) v22, p24-32). In the low jet velocity regime (subsonic, turbulent jet), the model predicts the salient features previously measured for the growth rate of the crater of time, the profile of the crater, and the response of the crater to turning the jet off. In the high jet velocity regime (compressible, near sonic jet flow) the prediction agrees qualitatively with prior experimental observations.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two-fluid modeling of cratering in a particle bed by a subsonic turbulent jet

LaMarche

Benavides-Morán

Wachem³

et al. 2017

Powder Technology

View full text Add to dashboard Cite

show abstract

“…In Gryczka et al [7,8], two-dimensional simulation results of a prismatic spouted bed with slit-shaped gas inlets under application of a CFD continuum model in the commercial software package FLUENT 6.2 were presented. The aim was to find a basic model to reproduce a realistic spouting process.…”

Section: Introductionmentioning

confidence: 99%

Three‐Dimensional Computational Fluid Dynamics Modeling of a Prismatic Spouted Bed

et al. 2009

Self Cite

View full text Add to dashboard Cite

Modern simulation tools like discrete particle models or continuum models have been established as precious methods to gain insight into the complex processes in fluidized and spouted beds. Valuable information on parameters influencing the hydrodynamics can be obtained directly from computer simulations. Numerous researchers applied two-dimensional discrete and continuum models to simulate fluidized and spouted beds. However, only few publications deal with three-dimensional continuum simulations, and very often results of three-dimensional experiments are compared with two-dimensional results. In this work, a three-dimensional simulation by application of a continuum model is presented in a prismatic spouted bed with slit-shaped gas inlets. Comparisons with two-dimensional simulations in the same geometry (Gryczka et al. 2009, Chem. Eng. Sci., in press) are also part of this publication. The influence of the third dimension on the hydrodynamic behavior (bubble formation, bubble size, etc.) will be discussed.

show abstract

“…The kinetic theory of granular flow is an extension of the classical kinetic gas theory realizing for inelastic particle/particle interaction [32,33]. Although these models have been frequently used for bubbling fluidized beds [34], mixing [35], downflow reactors [36] and spouted beds [37], Jung and Gamwo [38] were the first to apply multi-phase CFD modeling for chemical looping combustion processes. In their study the combustion of methane with NiO as an oxygen carrier was considered.…”

Section: Multi-phase Fluid Dynamicsmentioning

confidence: 99%

“…The standard k-ε model was used for both fluid and solid phase with a standard wall function to model for turbulence. For details on the use of a k-ε model within a two-phase framework see Gryczka et al [37]. Fluid particle momentum exchange was model through the approach by Gidaspow and heat transfer by the model of Gunn as outlined in [48].…”

Section: Simulation Parametersmentioning

confidence: 99%

A Study on the Role of Reaction Modeling in Multi-phase CFD-based Simulations of Chemical Looping Combustion

Kruggel‐Emden

Štěpánek

Munjiza

2011

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

Résumé -Impact du modèle de réaction sur les simulations CFD de la combustion en boucle chimique -La combustion en boucle chimique (Chemical Looping Combustion) est une technologie de combustion efficace permettant le captage in situ du CO 2 pour des charges gazeuses ou solides. Dans l'optique du développement et de l'extrapolation du procédé, la CFD est un outil de simulation à fort potentiel qui s'appuie notamment sur des modèles cinétiques pour décrire les réactions gaz-solide. Ces modèles décrivant les réactions sont généralement assez simples pour limiter les temps de simulation et sont obtenus à partir d'expérimentations en thermobalance. Il y a encore peu de travaux de modélisation CFD du procédé CLC et il est difficile d'estimer l'importance du modèle décrivant les réactions chimiques sur les résultats des simulations. Abstract -A Study on the Role of Reaction Modeling in Multi-phase CFD-based Simulations of Chemical Looping Combustion -Chemical Looping Combustion is an energy efficient combustion technology for the inherent separation of carbon dioxide for both gaseous and solid fuels. For scale up and further development of this process multi-phase CFD-based simulations have a strong potential

show abstract

Characterization and CFD-modeling of the hydrodynamics of a prismatic spouted bed apparatus

Cited by 80 publications

References 29 publications

Two-fluid modeling of cratering in a particle bed by a subsonic turbulent jet

Two-fluid modeling of cratering in a particle bed by a subsonic turbulent jet

Three‐Dimensional Computational Fluid Dynamics Modeling of a Prismatic Spouted Bed

A Study on the Role of Reaction Modeling in Multi-phase CFD-based Simulations of Chemical Looping Combustion

Contact Info

Product

Resources

About