A comprehensive comparison of Two-Fluid Model, Discrete Element Method and experiments for the simulation of single- and multiple-spout fluidized beds

Esgandari, Behrad; Rauchenzauner, Stefanie; Goniva, Christoph; Kieckhefen, Paul; Schneiderbauer, Simon

doi:10.1016/j.ces.2022.118357

Cited by 14 publications

(2 citation statements)

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“…Among these two coupling methods, Yu's research group tended to insist that the first coupling relationship be able to more reasonably reflect the true bidirectional strong coupling relationship between particles and fluid [9,11,12]. In recent two years, most CFD-DEM simulations [13][14][15][16][17][18][19] published in the renowned journal, Chem. Eng.…”

Section: Introductionmentioning

confidence: 99%

Decoupling Interaction for CFD-DEM Simulations of Bubbling Fluidized Bed

Li,

Wang,

2024

Preprint

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The discrete element method (DEM) coupled with computational dynamics (CFD) has been considered one of the most sensitive ways of studying fluidized beds. This paper presents gas-solid fluidized bed simulations by use of CFD-DEM. The two-phase interaction is calculated in a way of decoupling. Within the effective neighborhood of the particles, the kernel approximation method is used to calculate the local porosity, thereby calculating the drag force on the particles. At the grid scale, the momentum exchange coefficient is calculated using a two fluid model based method, thereby calculating the source term of the phase interaction in the fluid control equation. The simulated form, size and motion process of the big bubble are all consistent with experimental observations. The simulated solid volume fraction and relative pressure averaged in a horizontal plane at 45 mm above the bottom are in reasonable agreement with the experimental data. The fluctuation of the simulated bed height over time is similar to the experimental measurement results. The reproduction of these qualitative and quantitative results indicates that the proposed method effectively improves simulation performance and accuracy.

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Section: Introductionmentioning

confidence: 99%

Decoupling Interaction for CFD-DEM Simulations of Bubbling Fluidized Bed

Li,

Wang,

2024

Preprint

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“…Numerous studies have examined the characteristics of flow regimes of spout-fluidized beds [2,11,12]. The hydrodynamic characteristics of various flow regimes within a spout-fluidized bed were investigated by Link et al [13] through a combination of experimental and modeling approaches.…”

Section: Introductionmentioning

confidence: 99%

CFD-DEM simulation of heat transfer in spout-fluid beds

Hoorijani,

Esgandari,

Zarghami

et al. 2023

Chemical Engineering Research and Design

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Continuum modeling of gas–particle flows: an overview

Schneiderbauer

2024

Acta Mech

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In this review paper, we provide a brief overview of the recent advances in the continuum modeling of gas–particle flows. First, we focus on the kinetic theory-based two-fluid models, which have become a valuable tool to investigate small-scale moderately dense turbulent gas–particle flows. Second, the continuum description is quite restrictive with respect to the maximum grid spacing, and large-scale simulations usually employ coarse mesh resolutions to keep the analyses practicable. Such coarse-graining inevitably neglects the small unresolved scales, which requires additional modeling. Here, filtered two-fluid models have been applied successfully to a variety gas–solid flow problems. Finally, we give a condensed outline about future research challenges for the continuum modeling of gas–particle flows.

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A comprehensive comparison of Two-Fluid Model, Discrete Element Method and experiments for the simulation of single- and multiple-spout fluidized beds

Cited by 14 publications

References 73 publications

Decoupling Interaction for CFD-DEM Simulations of Bubbling Fluidized Bed

Decoupling Interaction for CFD-DEM Simulations of Bubbling Fluidized Bed

CFD-DEM simulation of heat transfer in spout-fluid beds

Continuum modeling of gas–particle flows: an overview

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