Effect of moisture content and length of flexible filamentous particles on cluster characteristics in a fluidized bed dryer

Wu, Kai; Gao, Linyu; Yuan, Zhulin; Li, Bin; Zhu, Wenkui; Wu, Ying; Zhang, Ke; Lu, Duanfeng; Luo, Dongmei

doi:10.1016/j.cherd.2018.06.009

Cited by 10 publications

(5 citation statements)

References 24 publications

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“…2014; Wu et al. 2018, 2019, 2020), and the particle velocities and particle spatial distributions were examined. It was found that the particle spatial distribution was non-uniform in the fluidized bed riser and clusters of particles were more easily created at low gas velocities and high solids mass flow rates.…”

Section: Introductionmentioning

confidence: 99%

“…These flexible granular materials normally have large particle aspect ratios and experience pronounced bending deformation, resulting in different flow behaviours from rigid particles . Computational and experimental studies of deformable, cut tobacco leaves in a fluidized bed dryer have been conducted (Geng et al 2014;Wu et al 2018Wu et al , 2019Wu et al , 2020, and the particle velocities and particle spatial distributions were examined. It was found that the particle spatial distribution was non-uniform in the fluidized bed riser and clusters of particles were more easily created at low gas velocities and high solids mass flow rates.…”

Section: Introductionmentioning

confidence: 99%

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Discrete element method–computational fluid dynamics analyses of flexible fibre fluidization

Jiang

Guo

et al. 2021

J. Fluid Mech.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Discrete element method–computational fluid dynamics analyses of flexible fibre fluidization

Jiang

Guo

et al. 2021

J. Fluid Mech.

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“…Lackmeier et al 47 proposed a method to visualize the internal structure of pilot CFB risers using laser sheet and image processing techniques. Wu 48 used a high-speed camera and image processing techniques to study the motion of nonspherical particles inside the lifting tube. By analyzing the relationship between the area of connected domains of particles and the number of connected domains, the domain area of 9000 pixels is used as a threshold to distinguish small clusters from large clusters.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Agglomeration Behavior of Elongated Biomass Particles in a Lifting Tube

Du,

Yang,

Tao

et al. 2024

ACS Omega

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Pneumatic conveying devices are commonly used in the fields of chemical industry, raw material transportation, and material processing. Elongated biomass particles are not evenly distributed in the lifting tube because biomass clumps during conveying. Pneumatic conveying test setup and measurement system were built in this paper in order to study the agglomeration behavior of elongated biomass particles in the lifting tube experimentally. Particle tracking velocimetry (PTV) was used to determine the area distribution and velocity distribution of particles at different apparent air velocities and mass flow rates. The results show that while keeping the mass flow rate constant at 46.50 g/s, the apparent gas velocity increased from 5.91 to 7.91 m/s and the maximum size of agglomerates decreased from 0.689 to 0.235. The apparent gas velocity was kept at 6.40 m/s, and the particle mass flow rate was adjusted from 56.50 to 16.20 g/s. The maximum size of the agglomerates was reduced to 0.115. Therefore, appropriately increasing the apparent gas velocity or decreasing the particle mass flow rate can improve the uniformity of the particle distribution in the lifting tube. The results would provide a reference for parameter adjustment of pneumatic conveying devices in industrial production.

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“…The previous work 1–28 mostly focused on clustering of spherical or close‐to‐spherical particles with negligible particle deformation. A few studies 29–32 were conducted to understand fluidization and clustering behaviors of flexible cut tobacco leaves, which have curved ribbonlike shapes. It was found that the clusters of these flexible tobacco particles were more easily formed at lower gas velocities and higher solids mass fluxes, and the increased particle length and moisture content led to an increase in cluster size.…”

Section: Introductionmentioning

confidence: 99%

Clustering in gas‐fluidized riser flows of flexible fibers

Wang

et al. 2023

AIChE Journal

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Clustering of flexible fibers in riser flows is investigated using a hybrid approach of Discrete Element Method and Computational Fluid Dynamics. Unlike spherical particles, the flexible fibers possess elongated shape, undergo significant deformation, and dissipate kinetic energies through rapid fiber deformation. The present studies show that these distinct features have significant impacts on the cluster characteristics of the fibers. A larger fiber aspect ratio leads to larger number and sizes of agglomerates, while it causes a reduction in heterogeneity of solids distribution due to the more dilute clusters with reduced packing densities. As the fibers become more flexible, the heterogeneity increases, and denser clusters are obtained. More significant effects of the fiber flexibility on the clustering are observed for the fibers with larger aspect ratios. The increased energy dissipation through the rapid fiber deformation enhances the clustering by augmenting the number and size of the agglomerates.

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Effect of moisture content and length of flexible filamentous particles on cluster characteristics in a fluidized bed dryer

Cited by 10 publications

References 24 publications

Discrete element method–computational fluid dynamics analyses of flexible fibre fluidization

Discrete element method–computational fluid dynamics analyses of flexible fibre fluidization

Experimental Study on the Agglomeration Behavior of Elongated Biomass Particles in a Lifting Tube

Clustering in gas‐fluidized riser flows of flexible fibers

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