Hydrodynamics studies of a pseudo 2D rectangular spouted bed by CFD

Hosseini, Seyyed Hossein; Fattahi, Mohsen; Ahmadi, Goodarz

doi:10.1016/j.powtec.2015.04.013

Cited by 29 publications

(18 citation statements)

References 25 publications

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“…The relevance of the specularity coefficient also depends on the geometry: Hosseini and colleagues [220] modelled a pseudo 2D spouted bed both in a 2D and a 3D approach. They highlighted that the latter yielded more accurate results but was significantly more sensitive to changes to the particle-wall restitution coefficient and the specularity coefficient (with best values found to be 0.2 and 0.05 respectively); nonetheless, they stressed out that the use of a complete 3D model was the best choice to accurately reproduce the bed behaviour.…”

Section: Optimisation Of Drag Laws and Coefficientsmentioning

confidence: 99%

“…Gidaspow [154] 17 [25,91,[204][205][206][208][209][210]213,218,220,222,226,228,229,234,235] Syamlal-O'Brien [158] 14 [89,90,92,114,203,207,214,215,224,225,[230][231][232]236 Turbulence was not extensively discussed in most works and when considered, the k-ε turbulence model [239] was mostly employed. As it can be seen in Table 9, almost half of the works did not include a turbulence model.…”

Section: Drag Law Number Of Occurrences Referencesmentioning

confidence: 99%

“…Number of Occurrences References k-ε 18 [90,92,203,204,206,209,211,212,[215][216][217][218][223][224][225][226][227][230][231][232],236] None or not specified 16 [25,89,91,202,203,205,207,208,210,213,214,[220][221][222]228,229] Riera and co-workers [217] simulated a multi-phase spouted column to test the validity of three turbulence models: the k-ε model, the k-ω model [240] and the SST model [241]. They observed that the k-ε and k-ω models yielded similar results for an air-water mixture, while the SST model was the most adequate for the air-water-sand mixture.…”

Section: Modelmentioning

confidence: 99%

See 2 more Smart Citations

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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Section: Optimisation Of Drag Laws and Coefficientsmentioning

confidence: 99%

Section: Drag Law Number Of Occurrences Referencesmentioning

confidence: 99%

Section: Modelmentioning

confidence: 99%

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

et al. 2017

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“…It was found that 2-D simulation is hard to quantitatively predict the result in CFB. A pseudo 2-D rectangular spouted bed was reported by Hosseini [25]. The result shows that 3-D model predicts hydrodynamics with higher accuracy than 2-D model for spouted bed.…”

Section: Introductionmentioning

confidence: 92%

Computational evaluation of depth effect on the hydrodynamics of slot-rectangular spouted bed

Qiu

Yang

et al. 2016

Powder Technology

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“…Regarding the modeling of spouted beds with an E2P formulation, the contributions of Hosseini et al [45] can be highlighted. In their contribution, they implemented an E2P model with a KTGF approach for a pseudo 2D spouted bed, based on the experimental studies of Liu et al [46].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling and Pointwise Validation of a Spouted Bed Using an Enhanced Bed Elasticity Approach

Uribe

Farid

et al. 2020

Energies

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With a Euler–Euler (E2P) approach, a mathematical model for predicting the pointwise hydrodynamic behavior of a spouted bed was implemented though computational fluid dynamics (CFD) techniques. The model considered a bed elasticity approach in order to reduce the number of required sub-models to provide closure for the solids stress strain-tensor. However, no modulus of elasticity sub-model for a bed elasticity approach has been developed for spouted beds, and thus, large deviations in the predictions are obtained with common sub-models reported in literature. To overcome such a limitation, a new modulus of elasticity based on a sensitivity analysis was developed and implemented on the E2P model. The model predictions were locally validated against experimental measurements obtained in previous studies. The experimental studies were conducted using our in-house developed advanced γ-ray computed tomography (CT) technique, which allows to obtain the cross-sectional time-averaged solids holdup distribution. When comparing the model predictions against the experimental measurements, a high predictive quality for the radial solids holdup distribution in the spout and annulus regions is observed. The model predicts most of the experimental measurements for different particle diameters, different static bed heights, and different inlet velocities with deviations under 15%, with average absolute relative errors (AARE) between 5.75% and 7.26%, and mean squared deviations (MSD) between 0.11% and 0.24%

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Hydrodynamics studies of a pseudo 2D rectangular spouted bed by CFD

Cited by 29 publications

References 25 publications

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

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

Computational evaluation of depth effect on the hydrodynamics of slot-rectangular spouted bed

Mathematical Modeling and Pointwise Validation of a Spouted Bed Using an Enhanced Bed Elasticity Approach

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