Prediction of particles separation in narrow inclined channels of liquid–solid fluidized bed

He, Shengrong; Li, Yanfeng; Liu, Taishan; Li, Zhengyong; Chen, Peng; Zhao, Yanfeng; Liang, Long; Zhang, Jie

doi:10.1016/j.powtec.2019.10.078

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…CFD is a computational tool utilized to incorporate the fundamental mechanisms that are crucial for accurately predicting the flow behavior and various properties of fluidized beds and to facilitate the design, scale-up, and optimization processes. The previously reported literature for the RC is mostly based on experimental investigations ,,− and theoretical models. ,− The experimental observations cover only the macroscopic behavior of such systems. Hence, numerical analysis may be regarded as a viable alternative method for examining the microscopic dynamics of inclination-augmented fluidized beds.…”

Section: Introductionmentioning

confidence: 99%

Impact of the Bend Angle on Monodisperse Particle Dynamics in an Inclination-Augmented Liquid–Solid Fluidized Bed

Puhan,

Mukherjee,

Atta

2024

Ind. Eng. Chem. Res.

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Inclination-augmented liquid−solid fluidized beds (LSFB), such as the Reflux Classifier, have been widely used in the mineral industries to isolate coal and mineral particles based on their size and density. Due to the intricacy of the liquid−solid flow and interfacial forces, the hydrodynamic behavior of an inclination-augmented LSFB exhibits greater complexity compared to that of a conventionally vertical fluidized bed. Here, we demonstrate the influence of the bend angle, defined as the angle between the vertical bottom and the inclined top section with respect to the horizontal plane, on the LSFB hydrodynamics and solid flow characteristics using a two-dimensional transient multifluid computational fluid dynamics model coupled with the kinetic theory of granular flow. The results are elaborated in terms of average solid volume fraction, length of solid suspension, pressure drop, vorticity, lateral distribution of solid horizontal velocity, vertical velocity, and solid volume fraction. The inclination angle of a LSFB augmented with inclinations notably influences bed hydrodynamics, especially at higher liquid velocities, such as when particles reach the inclined section. Increasing the bed inclination angle leads to a longer suspension length in the inclined section and a decrease in the average solid flux ratio. Bed inclination significantly alters bed pressure, with vorticity generation decreasing as the inclined top section aligns with the vertical bottom segment. While the inclination angle has no significant effect on solid horizontal velocity, it does significantly impact solid vertical velocity. Additionally, the inclination angle notably modifies the distribution of the solid volume fraction in both the lateral and vertical directions.

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Section: Introductionmentioning

confidence: 99%

Impact of the Bend Angle on Monodisperse Particle Dynamics in an Inclination-Augmented Liquid–Solid Fluidized Bed

Puhan,

Mukherjee,

Atta

2024

Ind. Eng. Chem. Res.

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“…It is extensively used to separate coal and mineral particles of varying sizes and densities in the coal beneficiation and mineral classification industries. − RC consists of a traditional liquid-fluidized bed with a set of parallel inclined plates placed above the fluidization section. Particle sedimentation in an inclined channel is substantially accelerated, and a sharp size classification is possible because of the Boycott effect, which provides a greater effective area for particle settling in comparison to a traditional LSFB. ,,, Previous studies on RC were mostly based on experimental investigations ,,− and theoretical models. ,− The intricacy of the flow and interfacial forces makes it difficult to simulate such systems.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Influence of Key Model Parameters in Two-Fluid CFD Modeling of an Inclination-Augmented Liquid–Solid Fluidized Bed

Puhan,

Mukherjee,

Atta

2023

Ind. Eng. Chem. Res.

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To understand the dynamics of liquid–solid flow in an inclined fluidized bed such as the Reflux Classifiers, two-dimensional numerical simulations are performed by using a two-fluid Eulerian model. There are several literature reports available for conventional fluidized beds, and also a few have modeled inclined channels using computational fluid dynamics (CFD) models. However, there is still no consensus on how to choose appropriate closure models and sensitive model parameters in the CFD modeling of a liquid–solid fluidized bed containing an inclined section at the top. Here, the influences of various pertinent model parameters like interphase drag force, lift force, solid viscosity model, particle–particle restitution coefficient, and particle-wall specularity coefficient on average solid volume fraction and suspension length are thoroughly demonstrated to realize their impact on the hydrodynamic behavior. This study suggests that for an inclined fluidized bed operated in the laminar regime, choosing suitable drag models and taking lift force into account result in a significant improvement in the model predictions.

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Insights into the influence of particle density and column inclination in polydisperse liquid–solid fluidized beds

2023

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Prediction of particles separation in narrow inclined channels of liquid–solid fluidized bed

Cited by 3 publications

References 28 publications

Impact of the Bend Angle on Monodisperse Particle Dynamics in an Inclination-Augmented Liquid–Solid Fluidized Bed

Impact of the Bend Angle on Monodisperse Particle Dynamics in an Inclination-Augmented Liquid–Solid Fluidized Bed

Analyzing the Influence of Key Model Parameters in Two-Fluid CFD Modeling of an Inclination-Augmented Liquid–Solid Fluidized Bed

Insights into the influence of particle density and column inclination in polydisperse liquid–solid fluidized beds

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