Novel phase inversion model for gas-solid turbulent fluidized beds

Yongxiang Gao; Xi Gao; Cheng Wu; Youwei Cheng; Lijun Wang; Xi Li

doi:10.1016/j.powtec.2015.06.003

Novel phase inversion model for gas-solid turbulent fluidized beds

Yongxiang Gao, Xi Gao, Cheng Wu, Youwei Cheng^*, Lijun Wang, Xi Li

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

A novel phase inversion model was developed to describe the hydrodynamics in turbulent fluidized beds. The proposed model was coupled by a bubble-emulsion two phase model and a gas-cluster two phase model, which was derived from the typical mesoscale structures of two coexisting regions in turbulent fluidized beds. In the dense, bubbling region, the bubble-based interphase forces were used, while in the dilute, dispersed region, the cluster-based interphase forces were developed. The criterion of phase inversion, namely bubble-to-gas, emulsion-to-cluster, or vice versa, was also proposed and tested. Simulation results were compared with experimental data under different conditions to validate the model. The interphase forces acting on bubble or cluster were analyzed to study the radial nonuniformity of solid volume fraction. A coarse grid was utilized in this model, showing more capacity for the industrial scale-ups.

Original language	English
Pages (from-to)	344-354
Number of pages	11
Journal	Powder Technology
Volume	283
DOIs	https://doi.org/10.1016/j.powtec.2015.06.003
State	Published - 2015
Externally published	Yes

Keywords

CFD
Multiphase flow
Phase inversion
Radial nonuniformity
Turbulent fluidized bed

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10.1016/j.powtec.2015.06.003

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@article{38c979fd96464080bd2b4740546c49ce,

title = "Novel phase inversion model for gas-solid turbulent fluidized beds",

abstract = "A novel phase inversion model was developed to describe the hydrodynamics in turbulent fluidized beds. The proposed model was coupled by a bubble-emulsion two phase model and a gas-cluster two phase model, which was derived from the typical mesoscale structures of two coexisting regions in turbulent fluidized beds. In the dense, bubbling region, the bubble-based interphase forces were used, while in the dilute, dispersed region, the cluster-based interphase forces were developed. The criterion of phase inversion, namely bubble-to-gas, emulsion-to-cluster, or vice versa, was also proposed and tested. Simulation results were compared with experimental data under different conditions to validate the model. The interphase forces acting on bubble or cluster were analyzed to study the radial nonuniformity of solid volume fraction. A coarse grid was utilized in this model, showing more capacity for the industrial scale-ups.",

keywords = "CFD, Multiphase flow, Phase inversion, Radial nonuniformity, Turbulent fluidized bed",

author = "Yongxiang Gao and Xi Gao and Cheng Wu and Youwei Cheng and Lijun Wang and Xi Li",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier B.V..",

year = "2015",

doi = "10.1016/j.powtec.2015.06.003",

language = "英语",

volume = "283",

pages = "344--354",

journal = "Powder Technology",

issn = "0032-5910",

publisher = "Elsevier",

}

TY - JOUR

T1 - Novel phase inversion model for gas-solid turbulent fluidized beds

AU - Gao, Yongxiang

AU - Gao, Xi

AU - Wu, Cheng

AU - Cheng, Youwei

AU - Wang, Lijun

AU - Li, Xi

PY - 2015

Y1 - 2015

N2 - A novel phase inversion model was developed to describe the hydrodynamics in turbulent fluidized beds. The proposed model was coupled by a bubble-emulsion two phase model and a gas-cluster two phase model, which was derived from the typical mesoscale structures of two coexisting regions in turbulent fluidized beds. In the dense, bubbling region, the bubble-based interphase forces were used, while in the dilute, dispersed region, the cluster-based interphase forces were developed. The criterion of phase inversion, namely bubble-to-gas, emulsion-to-cluster, or vice versa, was also proposed and tested. Simulation results were compared with experimental data under different conditions to validate the model. The interphase forces acting on bubble or cluster were analyzed to study the radial nonuniformity of solid volume fraction. A coarse grid was utilized in this model, showing more capacity for the industrial scale-ups.

AB - A novel phase inversion model was developed to describe the hydrodynamics in turbulent fluidized beds. The proposed model was coupled by a bubble-emulsion two phase model and a gas-cluster two phase model, which was derived from the typical mesoscale structures of two coexisting regions in turbulent fluidized beds. In the dense, bubbling region, the bubble-based interphase forces were used, while in the dilute, dispersed region, the cluster-based interphase forces were developed. The criterion of phase inversion, namely bubble-to-gas, emulsion-to-cluster, or vice versa, was also proposed and tested. Simulation results were compared with experimental data under different conditions to validate the model. The interphase forces acting on bubble or cluster were analyzed to study the radial nonuniformity of solid volume fraction. A coarse grid was utilized in this model, showing more capacity for the industrial scale-ups.

KW - CFD

KW - Multiphase flow

KW - Phase inversion

KW - Radial nonuniformity

KW - Turbulent fluidized bed

UR - http://www.scopus.com/inward/record.url?scp=84936754255&partnerID=8YFLogxK

U2 - 10.1016/j.powtec.2015.06.003

DO - 10.1016/j.powtec.2015.06.003

M3 - 文章

AN - SCOPUS:84936754255

SN - 0032-5910

VL - 283

SP - 344

EP - 354

JO - Powder Technology

JF - Powder Technology

ER -

Novel phase inversion model for gas-solid turbulent fluidized beds

Abstract

Keywords

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