Experimental study of local solid volume fraction fluctuations in a liquid fluidized bed: Particles with a wide range of stokes numbers

Marefatallah, Maedeh; Breakey, David E. S.; Sanders, R. Sean

doi:10.1016/j.ijmultiphaseflow.2020.103348

Cited by 7 publications

(1 citation statement)

References 21 publications

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“…It shows that the magnitude of fluctuations of liquid volume fraction is higher for both the k-ε and k-ω models near the wall. This is consistent with the findings of Marefatallah et al [24] which showed that the highest magnitude of fluctuation is usually around the near-wall region and can be up to 3 to 4 times greater than that at the center of the bed.…”

Section: Fig 4: Variation Of Y + Values With Bed Height For K-ε Turbu...supporting

confidence: 93%

Computational Fluid Dynamics Investigation of the Impact of Wall Treatment on Fluidization in a Liquid-Solid Fluidized Bed

Amuta,

Nwaji,

Ogueke

et al. 2023

IJASE

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This work investigates the influence of wall treatment on the prediction accuracy of the k-ε and k-ω models, as well as the solid volume fraction, in a solid-liquid fluidized bed. The objective of the study is to explore the effects of different y+ values on the performance of these turbulence models and the prediction of solid-liquid fluidized bed behavior. Using the Eulerian-Eulerian approach, a multiphase flow model was employed to simulate the behavior of solid particles and liquid in a fluidized bed. The standard conservation equations of continuity and momentum were solved to describe the flow dynamics. The research findings indicate that the k-ε model exhibits higher sensitivity to near-wall mesh refinement when predicting y+ values compared to the k-ω model. The k-ω model, however, demonstrates reasonably accurate predictions within the y+ range of 30 to 45. Furthermore, the k-ε model outperforms the k-ω model in predicting solid volume fractions when the near-wall region is refined. These results highlight the significance of wall treatment and near-wall mesh refinement in accurately predicting turbulent flow behavior in liquid-solid fluidized beds. The study contributes to a better understanding of the performance of turbulence models and their applicability to solid liquid fluidized beds.

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Section: Fig 4: Variation Of Y + Values With Bed Height For K-ε Turbu...supporting

confidence: 93%

Computational Fluid Dynamics Investigation of the Impact of Wall Treatment on Fluidization in a Liquid-Solid Fluidized Bed

Amuta,

Nwaji,

Ogueke

et al. 2023

IJASE

View full text Add to dashboard Cite

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Radial distribution of solid holdup and its fluctuation characteristics in a three-phase scrubbing-cooling chamber

Wang

Wei

et al. 2022

Chemical Engineering Science

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Fluctuation analysis and spatial distribution model of particle concentration in a lab-scale scrubbing-cooling chamber

Li,

Wang,

Zeng

et al. 2023

Chemical Engineering Research and Design

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Experimental study of local solid volume fraction fluctuations in a liquid fluidized bed: Particles with a wide range of stokes numbers

Cited by 7 publications

References 21 publications

Computational Fluid Dynamics Investigation of the Impact of Wall Treatment on Fluidization in a Liquid-Solid Fluidized Bed

Computational Fluid Dynamics Investigation of the Impact of Wall Treatment on Fluidization in a Liquid-Solid Fluidized Bed

Radial distribution of solid holdup and its fluctuation characteristics in a three-phase scrubbing-cooling chamber

Fluctuation analysis and spatial distribution model of particle concentration in a lab-scale scrubbing-cooling chamber

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