A dynamic coefficient of restitution applied to Two-fluid model in liquid-solid fluidized bed

Gao, Zhiyong; Liu, Guodong; Guo, Xinyao; Lu, Huilin

doi:10.1016/j.powtec.2022.117335

Cited by 9 publications

(1 citation statement)

References 30 publications

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“…Several numerical models, such as the two-fluid model (TFM) and the computational fluid dynamics-discrete element method (CFD-DEM), have been employed in a multitude of simulation studies investigating LSFB systems. The Euler–Euler model ,− and the Euler–Lagrange model (CFD-DEM) − are widely employed techniques for numerically simulating two-phase or multiphase particulate flows. In the Euler–Euler technique, the fluid and solid phases are regarded as interpenetrating continua, and their representation is accomplished by the utilization of the Navier–Stokes equations.…”

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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