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Experimental and numerical study of wall layer development in a tribocharged fluidized bed

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Experimental and numerical study of wall layer development in a tribocharged fluidized bed. / Sippola, Petteri; Kolehmainen, Jari; Ozel, Ali; Liu, Xiaoyu; Saarenrinne, Pentti; Sundaresan, Sankaran.

In: Journal of Fluid Mechanics, Vol. 849, 25.08.2018, p. 860-884.

Research output: Contribution to journalArticleScientificpeer-review

Harvard

Sippola, P, Kolehmainen, J, Ozel, A, Liu, X, Saarenrinne, P & Sundaresan, S 2018, 'Experimental and numerical study of wall layer development in a tribocharged fluidized bed', Journal of Fluid Mechanics, vol. 849, pp. 860-884. https://doi.org/10.1017/jfm.2018.412

APA

Sippola, P., Kolehmainen, J., Ozel, A., Liu, X., Saarenrinne, P., & Sundaresan, S. (2018). Experimental and numerical study of wall layer development in a tribocharged fluidized bed. Journal of Fluid Mechanics, 849, 860-884. https://doi.org/10.1017/jfm.2018.412

Vancouver

Sippola P, Kolehmainen J, Ozel A, Liu X, Saarenrinne P, Sundaresan S. Experimental and numerical study of wall layer development in a tribocharged fluidized bed. Journal of Fluid Mechanics. 2018 Aug 25;849:860-884. https://doi.org/10.1017/jfm.2018.412

Author

Sippola, Petteri ; Kolehmainen, Jari ; Ozel, Ali ; Liu, Xiaoyu ; Saarenrinne, Pentti ; Sundaresan, Sankaran. / Experimental and numerical study of wall layer development in a tribocharged fluidized bed. In: Journal of Fluid Mechanics. 2018 ; Vol. 849. pp. 860-884.

Bibtex - Download

@article{7c9959b64c154ab59682857270454bc0,
title = "Experimental and numerical study of wall layer development in a tribocharged fluidized bed",
abstract = "The effects of triboelectricity in a small-scale fluidized bed of polyethylene particles were investigated by imaging the particle layer in the vicinity of the column wall and by measuring the pressure drop across the bed. The average charge on the particles was altered by changing the relative humidity of the gas. A triboelectric charging model coupled with a computational fluid dynamics-discrete element method (CFD-DEM) model was utilized to simulate gas-particle flow in the bed. The electrostatic forces were evaluated based on a particle-particle particle-mesh method, accounting for the surface charge on the insulating walls. It was found that simulations with fixed and uniform charge distribution among the particles capture remarkably well both the agglomeration of the particles on the wall and the associated decrease in the pressure drop across the bed. With a dynamic tribocharging model, the charging rate had to be accelerated to render the computations affordable. Such simulations with an artificial acceleration significantly over-predict charge segregation and the wall becomes rapidly sheeted with a single layer of strongly charged particles.",
keywords = "fluidized beds, multiphase and particle-laden flows",
author = "Petteri Sippola and Jari Kolehmainen and Ali Ozel and Xiaoyu Liu and Pentti Saarenrinne and Sankaran Sundaresan",
note = "EXT={"}Kolehmainen, Jari{"}",
year = "2018",
month = "8",
day = "25",
doi = "10.1017/jfm.2018.412",
language = "English",
volume = "849",
pages = "860--884",
journal = "Journal of Fluid Mechanics",
issn = "0022-1120",
publisher = "Cambridge University Press",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Experimental and numerical study of wall layer development in a tribocharged fluidized bed

AU - Sippola, Petteri

AU - Kolehmainen, Jari

AU - Ozel, Ali

AU - Liu, Xiaoyu

AU - Saarenrinne, Pentti

AU - Sundaresan, Sankaran

N1 - EXT="Kolehmainen, Jari"

PY - 2018/8/25

Y1 - 2018/8/25

N2 - The effects of triboelectricity in a small-scale fluidized bed of polyethylene particles were investigated by imaging the particle layer in the vicinity of the column wall and by measuring the pressure drop across the bed. The average charge on the particles was altered by changing the relative humidity of the gas. A triboelectric charging model coupled with a computational fluid dynamics-discrete element method (CFD-DEM) model was utilized to simulate gas-particle flow in the bed. The electrostatic forces were evaluated based on a particle-particle particle-mesh method, accounting for the surface charge on the insulating walls. It was found that simulations with fixed and uniform charge distribution among the particles capture remarkably well both the agglomeration of the particles on the wall and the associated decrease in the pressure drop across the bed. With a dynamic tribocharging model, the charging rate had to be accelerated to render the computations affordable. Such simulations with an artificial acceleration significantly over-predict charge segregation and the wall becomes rapidly sheeted with a single layer of strongly charged particles.

AB - The effects of triboelectricity in a small-scale fluidized bed of polyethylene particles were investigated by imaging the particle layer in the vicinity of the column wall and by measuring the pressure drop across the bed. The average charge on the particles was altered by changing the relative humidity of the gas. A triboelectric charging model coupled with a computational fluid dynamics-discrete element method (CFD-DEM) model was utilized to simulate gas-particle flow in the bed. The electrostatic forces were evaluated based on a particle-particle particle-mesh method, accounting for the surface charge on the insulating walls. It was found that simulations with fixed and uniform charge distribution among the particles capture remarkably well both the agglomeration of the particles on the wall and the associated decrease in the pressure drop across the bed. With a dynamic tribocharging model, the charging rate had to be accelerated to render the computations affordable. Such simulations with an artificial acceleration significantly over-predict charge segregation and the wall becomes rapidly sheeted with a single layer of strongly charged particles.

KW - fluidized beds

KW - multiphase and particle-laden flows

U2 - 10.1017/jfm.2018.412

DO - 10.1017/jfm.2018.412

M3 - Article

VL - 849

SP - 860

EP - 884

JO - Journal of Fluid Mechanics

JF - Journal of Fluid Mechanics

SN - 0022-1120

ER -