Comparison of two-fluid and discrete particle modeling of gas-particle flows in micro fluidized beds

Liu, Xu; Su, Jinglin; Qian, Yanan; Cui, Li; Liu, Xiaoxing

doi:10.1016/j.powtec.2018.06.039

Cited by 25 publications

(2 citation statements)

References 47 publications

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“…The inter-phase momentum exchange between gas and solid phases is calculated using the Gidaspow gas-solid drag model [42]. The governing equations and constitutive relations used in this study are summarized in Table 3 [43]. The subscripts f and s represent the gas and the solid phases, respectively.…”

Section: Numerical Modelmentioning

confidence: 99%

Fluid Dynamics Investigation in a Cold Flow Model of Internal Recycle Quadruple Fluidized Bed Coal Pyrolyzer

Cao,

Yu,

Wang

et al. 2024

Processes

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Internal recycle quadruple fluidized bed pyrolyzer (IR-QFBP) consists of a dual fluidized bed pyrolyzer and a dual fluidized bed combustor and is proposed in this work. It is a new kind of efficient fluidized bed with high pyrolysis and energy efficiency. IR-QFBP may attract extensive attention because of its compact structure. Cold hydrodynamic characteristics of IR-QFBP are the bases of modeling and designing for the hot one. To fully understand the hydrodynamic characteristics of IR-QFBP, a cold flow model on a laboratory scale was designed and set up; furthermore, the two-fluid model (TFM) based simulation was also carried out. The pressure profiles, fluidization states, velocity profiles, and circulation rates of a solid powder at different operation conditions in IR-QFBP were investigated. The results showed that the stable internal circulation of solid powder can be achieved in IR-QFBP. And different circulation characteristics can be obtained by adjusting the operating conditions.

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Section: Numerical Modelmentioning

confidence: 99%

Fluid Dynamics Investigation in a Cold Flow Model of Internal Recycle Quadruple Fluidized Bed Coal Pyrolyzer

Cao,

Yu,

Wang

et al. 2024

Processes

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“…Dong, Zou, Yang, Yu, and Roach (2009) used DEM to study the growth of cake formation during the filtration process. Furthermore, considering that both CFD and DEM had their own advantages, researchers combined them together to study the twophase flow under different conditions (Liu, Su, Qian, Cui, & Liu, 2018;Ma, Wei, Pei, Zhu, & Xu, 2018;Mahmoodi, Hosseini, & Ahmadi, 2018). Riefler, Ulrich, Morshäuser, and Fritsching (2018) studied particle penetration in fiber filters by using coupled DEM-CFD simulation.…”

Section: Contact Xuedong Liumentioning

confidence: 99%

Investigating the filtration behavior of metal fiber felt using CFD-DEM simulation

Liu

Ding

Chen

et al. 2019

Engineering Applications of Computational Fluid Mechanics

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This paper studies the dynamic filtration behavior of coal particles in metal fiber felt, by developing a three-dimensional model based on microstructure and arrangement mode of metal fiber felt identified by scanning electron microscope. Discrete element method (DEM) is coupled with Computational fluid dynamics (CFD) to simulate filtration of coal particles in metal fiber felt. The simulation mainly studies the moving trail and deposition characteristics of spherical coal particles. The results demonstrated that coal particles can bypass the metal fibers and enter the inside of the metal fiber felt through mesh channels. The moving trail of coal particles is similar to a broken line. It is also shown that most coal particles are trapped due to the deep filtration of metal fiber felt and the distribution pattern of them is inhomogeneous. The number of particles trapped by metal fiber felt is reduced in the direction of thickness. It is found that coal particles can be trapped not only by randomly arranged metal fibers, but also by coal particles deposited previously. Finally, the kinetic energy loss of coal particles mainly occurs in the initial stage when particles pass through metal fiber felt. And the velocity of coal particles inside metal fiber felt is maintained at 0.15-0.25 m/s. Highlights • A more realistic three-dimensional model was reconstructed according to scanning electron microscope pictures. • The particle trajectory, deposition mode of particle groups and speed change of particles were investigated using CFD-DEM in the paper. • The simulation method was validated by the experiment.

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Architecture Design and Application Prospect of Predictive Maintenance Based on Multi-station Integration Edge Computing in Power Field

Yuan

Sun

et al. 2020

Emerging Trends in Intelligent and Interactive Systems and Applications

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Comparison of two-fluid and discrete particle modeling of gas-particle flows in micro fluidized beds

Cited by 25 publications

References 47 publications

Fluid Dynamics Investigation in a Cold Flow Model of Internal Recycle Quadruple Fluidized Bed Coal Pyrolyzer

Fluid Dynamics Investigation in a Cold Flow Model of Internal Recycle Quadruple Fluidized Bed Coal Pyrolyzer

Investigating the filtration behavior of metal fiber felt using CFD-DEM simulation

Architecture Design and Application Prospect of Predictive Maintenance Based on Multi-station Integration Edge Computing in Power Field

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