Experimental and numerical investigation of sands and Geldart A biomass co-fluidization

Liqiang Lu; Jia Yu; Xi Gao; Yupeng Xu; Mehrdad Shahnam; William A. Rogers

doi:10.1002/aic.16969

Experimental and numerical investigation of sands and Geldart A biomass co-fluidization

Liqiang Lu^*, Jia Yu, Xi Gao, Yupeng Xu, Mehrdad Shahnam, William A. Rogers

^*Corresponding author for this work

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

24 Scopus citations

Abstract

This article investigated the fluidization of sands and small Geldart A biomass mixtures. The mixture fluidized like Geldart A type particles with a uniform bed expansion regime before bubbling. The video recorded color distance between pure sands and sands–biomass mixtures was used to estimate the sands–biomass mixing. The coarse-grained computational fluid dynamics–discrete element method with a hybrid drag model which couples the Syamlal–O'Brien drag and a filtered drag can capture the mixing while the simulation with Gidaspow drag predicted a segregated bed. The simulations were further validated with experimental measured pressure drops. The time averaged pressure drop equals the weight of the bed material, however, its fluctuation is about three times of the bed material fluctuation.

Original language	English
Article number	e16969
Journal	AICHE Journal
Volume	66
Issue number	6
DOIs	https://doi.org/10.1002/aic.16969
State	Published - 1 Jun 2020
Externally published	Yes

Keywords

biomass
coarse-grained CFD–DEM
drag model
filtered model
fluidized bed

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10.1002/aic.16969

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title = "Experimental and numerical investigation of sands and Geldart A biomass co-fluidization",

abstract = "This article investigated the fluidization of sands and small Geldart A biomass mixtures. The mixture fluidized like Geldart A type particles with a uniform bed expansion regime before bubbling. The video recorded color distance between pure sands and sands–biomass mixtures was used to estimate the sands–biomass mixing. The coarse-grained computational fluid dynamics–discrete element method with a hybrid drag model which couples the Syamlal–O'Brien drag and a filtered drag can capture the mixing while the simulation with Gidaspow drag predicted a segregated bed. The simulations were further validated with experimental measured pressure drops. The time averaged pressure drop equals the weight of the bed material, however, its fluctuation is about three times of the bed material fluctuation.",

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AU - Lu, Liqiang

AU - Yu, Jia

AU - Gao, Xi

AU - Xu, Yupeng

AU - Shahnam, Mehrdad

AU - Rogers, William A.

PY - 2020/6/1

Y1 - 2020/6/1

N2 - This article investigated the fluidization of sands and small Geldart A biomass mixtures. The mixture fluidized like Geldart A type particles with a uniform bed expansion regime before bubbling. The video recorded color distance between pure sands and sands–biomass mixtures was used to estimate the sands–biomass mixing. The coarse-grained computational fluid dynamics–discrete element method with a hybrid drag model which couples the Syamlal–O'Brien drag and a filtered drag can capture the mixing while the simulation with Gidaspow drag predicted a segregated bed. The simulations were further validated with experimental measured pressure drops. The time averaged pressure drop equals the weight of the bed material, however, its fluctuation is about three times of the bed material fluctuation.

AB - This article investigated the fluidization of sands and small Geldart A biomass mixtures. The mixture fluidized like Geldart A type particles with a uniform bed expansion regime before bubbling. The video recorded color distance between pure sands and sands–biomass mixtures was used to estimate the sands–biomass mixing. The coarse-grained computational fluid dynamics–discrete element method with a hybrid drag model which couples the Syamlal–O'Brien drag and a filtered drag can capture the mixing while the simulation with Gidaspow drag predicted a segregated bed. The simulations were further validated with experimental measured pressure drops. The time averaged pressure drop equals the weight of the bed material, however, its fluctuation is about three times of the bed material fluctuation.

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Experimental and numerical investigation of sands and Geldart A biomass co-fluidization

Abstract

Keywords

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