Numerical Study on the Gas–Solid Flow in a Spouted Bed Installed with a Controllable Nozzle and a Swirling Flow Generator

Wu, Feng; Che, Xinxin; Huang, Zhenkai; Duan, Haojie; Ma, Xiaoxun; Zhou, Wenjing

doi:10.1021/acsomega.9b02704

Cited by 18 publications

(6 citation statements)

References 43 publications

(66 reference statements)

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“…The Euler–Lagrange model is used to calculate the two-phase flow, where one of the phases is dispersed, the volume fraction of the dispersed phase is less than 0.1 . The Euler–Euler model is useful for describing the double continuous two-phase flow, and it includes the Euler model, mixture model, VOF model, and other interface capture models. , In the present study, the gas–liquid two-phase flow does not have a stable continuous interface between gas and liquid, and the dispersed phase exhibits the phenomenon of coalescence and broken . Therefore, the Euler model and mixture model are much more suitable for the calculation of the gas–liquid two-phase flow and separation behaviors in multiple T-junctions. Euler model In the Euler model, the governing equations include continuity and momentum equations for each phase that should be solved in the multiphase flow.…”

Section: Numerical Methods and Multiphase Flow Modelsmentioning

confidence: 96%

“…22 The Euler−Euler model is useful for describing the double continuous two-phase flow, and it includes the Euler model, mixture model, VOF model, and other interface capture models. 23,24 In the present study, the gas−liquid two-phase flow does not have a stable continuous interface between gas and liquid, and the dispersed phase exhibits the phenomenon of coalescence and broken. 25 Therefore, the Euler model and mixture model are much more suitable for the calculation of the gas−liquid two-phase flow and separation behaviors in multiple T-junctions.…”

Section: ■ Appendix Numerical Methods and Multiphase Flow Modelsmentioning

confidence: 99%

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Investigation of the Gas–Liquid Two-Phase Flow and Separation Behaviors at Inclined T-Junction Pipelines

Zhang

Liu

et al. 2020

ACS Omega

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The T-junction is a novel type of separator used in the petroleum and gas industry. It is used to achieve the gas–liquid or liquid–liquid two-phase separation. To obtain an applicative T-junction separator, in the present study, the gas–liquid two-phase separation characteristics in multiple inclined T-junctions were investigated through a series of numerical simulations and field experiments. Two representative multiphase modes, namely, the Euler model and the mixture model, were chosen for this study. Comparisons of the field experiments were made to obtain a highly accurate simulation model. The mixture model was chosen to be better suited for this study. It is used to investigate the gas–liquid two-phase flow and the separation behaviors, which include the effect of inlet flow velocity, inlet bubble diameter, and the split ratio of two outlets. The results indicate that the best flow split ratio exists when the two-phase separation reaches the best consequence, and the best flow split ratio changes when the separation demands of gas or liquid are different. Furthermore, the separation efficiency keeps decreasing as the inlet velocity is increased. Hence, the inlet mixture velocity should be reduced to improve the gas–liquid two-phase separation. More specifically, to obtain a better separation for the same throughput, the size of the T-junction should be increased. Moreover, the separation efficiency increases as the inlet bubble diameter increases. Consequently, the results can be used to design the T-junction as an industrial separator, which can then be directly used in petroleum and gas production.

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Section: Numerical Methods and Multiphase Flow Modelsmentioning

confidence: 96%

Section: ■ Appendix Numerical Methods and Multiphase Flow Modelsmentioning

confidence: 99%

Investigation of the Gas–Liquid Two-Phase Flow and Separation Behaviors at Inclined T-Junction Pipelines

Zhang

Liu

et al. 2020

ACS Omega

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“…Reasonable selection and design can effectively achieve specific industrial production purposes and improve industrial production efficiency. The geometry size and bed structure will also directly affect the gas-solid flow characteristics and the performance of the fluidized bed [54][55][56][57][58][59][60][61]. Transverse internals such as grid trays will increase the turbulence degree and the residence time of the particles, and increase the reaction efficiency [15,22,[62][63].…”

Section: Gas-solid Flow Characteristicsmentioning

confidence: 99%

Research Progress on Numerical Simulation of Two-phase Flow in the Gas-solid Fluidized Bed

et al. 2021

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It is difficult to accurately measure the parameters of solid particles in the experiment of the gas-solid fluidized bed. The numerical simulation plays an important role to accurately describe flow characteristics in the fluidized bed. Combined with the research work of the research group, this paper analyzes the application of numerical simulation of fluidized bed from the aspects of gas-solid coupling algorithm, drag model, flow characteristics, and reaction characteristics based on the previous studies. The specificity improvement of the gas-solid coupling algorithm and the regional application of the drag model is the trend of the recent development of numerical simulation. Previous studies mainly focus on the gas-solid two-phase flow field characteristics in the traditional fluidized bed, but few on the complex flow characteristics such as gas-solid reverse flow and the coupling with reaction characteristics. It is of great significance for designing a novel fluidized bed reactor to realize gas-solid continuous reaction to establish and improve the numerical simulation method of gas-solid non-catalytic reaction.

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“…They concluded that the 3D simulation method instead of the 2D method is necessary to provide representative results. Wu et al studied 3D hydrodynamic behaviors of a spouted bed under swirling flow. Zhao et al reported that the application of an effective restitution coefficient and drag model in TFM method could improve the accuracy of prediction significantly in a 3D spouted fluidized bed.…”

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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Numerical Study on the Gas–Solid Flow in a Spouted Bed Installed with a Controllable Nozzle and a Swirling Flow Generator

Cited by 18 publications

References 43 publications

Investigation of the Gas–Liquid Two-Phase Flow and Separation Behaviors at Inclined T-Junction Pipelines

Investigation of the Gas–Liquid Two-Phase Flow and Separation Behaviors at Inclined T-Junction Pipelines

Research Progress on Numerical Simulation of Two-phase Flow in the Gas-solid Fluidized Bed

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

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