Computational fluid dynamic modeling of spouted beds

Bao, Xiaojun; Du, Wei; Xu, Jian

doi:10.1017/cbo9780511777936.005

Cited by 3 publications

(4 citation statements)

References 60 publications

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“…In general terms, all the reviewed works of this paper refer to simulations validated with experimental data and have been carried out at room temperature, unless stated otherwise. Previous literature works summarising the state of art on CFD modelling of SB [139,140] highlighted the lack of a deep comprehension of the physical behaviour of the solid phase and the absence of a common agreement between researchers on the most accurate models and parameters for several simulated physical features, emphasising the role of turbulence. This feature, as shown in the following paragraphs, is still open in more recent works.…”

Section: Modelling Based On the Eulerian-lagrangian Approachmentioning

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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Section: Modelling Based On the Eulerian-lagrangian Approachmentioning

confidence: 99%

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

et al. 2017

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“…The basic principles of DPM were described in detail and reviewed by Deen et al [18]. An overview on numerical investigations on spouted beds can be found in [19]. For the investigated apparatus configuration, Gryczka et al [20] and Jacob [21] reported 2D-CFD studies by using an Euler-Euler approach.…”

Section: Numerical Investigations On Spouted Bedsmentioning

confidence: 99%

Characterization and CFD-DEM modelling of a prismatic spouted bed

et al. 2015

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“…Particles are individually mapped and treated by the application of Newton's second law of motion. This approach is not appropriate for systems on a large scale, as the computational effort grows significantly with the increase of particle fraction in the bed [35].…”

Section: Modeling the Mixture Of Msw And Sand In A Csbmentioning

confidence: 99%

“…Especially for spouted bed contactors, as there is no standard model to properly describe the gas-solid flow pattern achieved in the bed. Many researchers have used the k-ε model to describe turbulence in spouted beds [30,31,35].…”

Section: Drag Modelsmentioning

confidence: 99%

Assessment of air-sand-biomass flow and particle segregation in a conical spouted bed using CFD

Araújo

Faria

Bacelos

et al. 2023

Preprint

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Biomass pyrolysis is a promising technology used to obtain important industrial chemicals or to produce renewable energy. For pyrolysis reaction, conical spouted beds (CSBs) can be used because of the high heat and mass transfer rates. On the other hand, for CSB either the fluid dynamics stability or particle segregation may limit its usage as a reactor. As a contribution to the application of CSB reactors for biomass pyrolysis, this research aims not only to test Euler-Euler models to predict segregation in CSBs composed of binary mixtures with different particle shapes and densities but also present experimental verification. The computational fluid dynamic (CFD) designs are carried out using the Euler granular model. The results reveal that the CFD simulation using Gidaspow's drag and dispersed k-ε turbulence models can better represent the experimental pressure drop and axial biomass particle concentration in the bed.

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Computational fluid dynamic modeling of spouted beds

Cited by 3 publications

References 60 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

Characterization and CFD-DEM modelling of a prismatic spouted bed

Assessment of air-sand-biomass flow and particle segregation in a conical spouted bed using CFD

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