CFD modeling of heat transfer and hydrodynamics in a draft tube conical spouted bed reactor under pyrolysis conditions: Impact of wall boundary condition

Hooshdaran, Bahar; Hosseini, Seyyed Hossein; Haghshenasfard, Masoud; Esfahany, Mohsen Nasr; Olazar, Martı́n

doi:10.1016/j.applthermaleng.2017.08.044

Cited by 22 publications

(6 citation statements)

References 42 publications

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“…A spouted bed is a device with stable gas–solid circulation flow pattern, and its applications include mixing, heating/cooling, drying, , coating, and chemical reactions, and the related industries are the chemical and electrochemical, metallurgy, food and agricultural, pharmaceutical, as well as energy and nuclear sectors. Gishler applied spouted bed technology in drying process industry for the first time and reported significantly improved efficiency.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Cross-Domain Hydrodynamics in an Integrated Pneumatic-Spouted Bed

Jiao

Wang

Mei

et al. 2023

Ind. Eng. Chem. Res.

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As an essential resource, the drying, upgrading, and efficient utilization of lignite are of great significance to the development of the low-carbon economy. In this work, a novel drying system, combining a pneumatic and spouted bed, is designed to achieve lignite deeply dewatering. The system is investigated experimentally and numerical simulated to characterize the hydrodynamics of particles moving across the domain, such as pressure drop, fountain height, and pressure fluctuation. The results show that there is a critical gas velocity that changes the flow pattern of the bed when the static bed is higher than 50 mm. When the gas velocity increases to the critical value, the spouting state becomes unstable and the corresponding pressure drop will undergo a secondary mutation. This work provides a deeper understanding of the flow structure and particle motion in the novel drying system under various industrial operating conditions.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Cross-Domain Hydrodynamics in an Integrated Pneumatic-Spouted Bed

Jiao

Wang

Mei

et al. 2023

Ind. Eng. Chem. Res.

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“…Kumar et al [17] use CFD to investigate the syngas production of various biomass feedstocks. Hooshadaran et al [18] studied the heat transfer in a draft tube conical spouted bed reactor under pyrolysis conditions. The CFD predictions results were in close quantitative agreement with measurements in terms of heattransfer coefficients.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamics, heat transfer and kinetics reaction of CFD modeling of a batch stirred reactor under hydrothermal carbonization conditions

Sangaré

Bostyn

Moscosa-Santillán

et al. 2021

Energy

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“…The first, known as TFM (Two fluid model), considers the solid and fluid phases as continuous and interpenetrating, and the properties of the solid phase can be described by the Kinetic Theory of Granular Flow (KTGF). This approach is widely used [1][2][3][4]. The second, called CFD-DEM coupled (Computational Fluid Dynamics/Discrete Element Method), considers the fluid phase as continuous, while the solid phase is treated as discrete from the modeling of the individual motion of each particle present in the system.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of different mathematical models in the CFD-DEM simulation of conical spouted bed fluid dynamics

Béttega

2021

CI&CEQ

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The input parameters, empirical, and semi-empirical models significantly influence the responses obtained by CFD-DEM simulations. In this work, the effect of three turbulence models, three conditions of the particle rotation, and five drag models on the fluid dynamic behavior of a conical spout bed applied to the drying of sorghum grains were evaluated. Experimental data on the solids pressure drop, height, and shape of the fountain were used to validate the simulations. Results showed the importance of including the particle rotation in the model to approximate the results simulated with the experimental behavior. Compared with experimental data, considering the particle rotation by Dennis et al. model, the deviation was of the 2% for the fountain height and 9.18% for the pressure drop. While for the model without the particle rotation, the deviations were 106.33% and 42.31% for the fountain height and pressure drop, respectively. For the analyzed case, the standard k-? turbulence model showed a greater agreement with the experimental data. For the drag models evaluated, the best fit with the experimental data was obtained by the Koch-Hill drag model, followed by the Gidaspow model, with deviations less than 10%.

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CFD modeling of heat transfer and hydrodynamics in a draft tube conical spouted bed reactor under pyrolysis conditions: Impact of wall boundary condition

Cited by 22 publications

References 42 publications

Experimental and Numerical Study of Cross-Domain Hydrodynamics in an Integrated Pneumatic-Spouted Bed

Experimental and Numerical Study of Cross-Domain Hydrodynamics in an Integrated Pneumatic-Spouted Bed

Hydrodynamics, heat transfer and kinetics reaction of CFD modeling of a batch stirred reactor under hydrothermal carbonization conditions

Evaluation of different mathematical models in the CFD-DEM simulation of conical spouted bed fluid dynamics

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