Experimental verification of the Brinkman equation around objects with various shapes in gas–solid stationary and fluidized beds

Honda, Yoshiyuki; Saito, Shiori; Anzai, Tetsuya; Harada, Shusaku; Tsuji, Tomohiro; Washino, Kimiaki; Oshitani, Jun; Kajiwara, Hirokazu; Matsuoka, Kei

doi:10.1016/j.ijmultiphaseflow.2022.104359

Cited by 6 publications

(1 citation statement)

References 14 publications

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“…The axial intake method is sometimes used in airflow powder mixers, which results in the radial mixing strength of particles being weaker than the axial mixing strength. [16][17][18] This is because the horizontal velocity of particles is smaller than the vertical velocity. The problem of inadequate lateral mixing of solids and gas-solids in contact in shallow fluidized beds can be overcome in many ways.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of the mixing characteristics in an air swirling fluidized bed with monodisperse and multi‐sized particles

et al. 2023

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Powder mixers are used in many industries. In the present work, a new type of air swirling mixer was designed and optimized with eight horizontally arranged inlet pipes at the tangential inlet angle of 35°. The mixing of multi‐sized spherical particles (2.0, 3.0, 4.0, and 5.0 mm) was numerically investigated in the air swirling mixer by coupled computational fluid dynamics–discrete element method. The numerical results showed that multi‐sized particles achieved comparable mixing performance to monodisperse particles. The Lacey index for multi‐sized particles increased initially, and then reached a maximum value at 0.824. The upward velocity of the particles, , increased initially, and then decreased to zero along the bed height. The maximum value of occurred at a height of 40 mm. Particle radial velocity was larger near the wall than at the mixer tube centre area. The smallest particles aggregated in three layers. The collision number of the particles reached a maximum at bed height of 120 mm, which was consistent with the position of the maximum stress of the particles against the tube wall.

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Section: Introductionmentioning

confidence: 99%

Numerical study of the mixing characteristics in an air swirling fluidized bed with monodisperse and multi‐sized particles

et al. 2023

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Investigation on the influence of particle size and porosity on solid phase fluidization and heat transfer in carbon fibre porous media

Wang,

Zhang,

Yang

2024

Can J Chem Eng

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In this paper, the 3D pore structure was reconstructed and solid phase fluidization in porous media was investigated. Based on the two fluid model, a computational fluid dynamics (CFD) model of gas–solid fluidization was established and the influence of particle size and porosity were investigated. When porosity was constant, during the fluidization process, the particle velocity and solid concentration standard deviation gradually decreased, and the bed height increased. At the same time, the smaller the particle size was, the smaller the solid concentration standard deviation was, the faster the bed height increased, and the more the particle temperature decreased. Based on the fixed value of particle size, when studying the effect of porosity on fluidization, it was found that with the enhancement of solid‐phase fluidization, particle velocity, solid concentration standard deviation, and particle temperature decreased, and bed height increased. Moreover, when porosity was large, particle velocity decreased rapidly, and solid concentration standard deviation reached a smaller minimum value, which took a longer time. Within the same time, the particle temperature also decreased less.

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Wireless measurement of Float-Sink motion of Variously-shaped objects in Gas-Solid fluidized bed

Uemoto

Narita

Harada

et al. 2023

Advanced Powder Technology

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Experimental verification of the Brinkman equation around objects with various shapes in gas–solid stationary and fluidized beds

Cited by 6 publications

References 14 publications

Numerical study of the mixing characteristics in an air swirling fluidized bed with monodisperse and multi‐sized particles

Numerical study of the mixing characteristics in an air swirling fluidized bed with monodisperse and multi‐sized particles

Investigation on the influence of particle size and porosity on solid phase fluidization and heat transfer in carbon fibre porous media

Wireless measurement of Float-Sink motion of Variously-shaped objects in Gas-Solid fluidized bed

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