Voidage profiles in a circulating fluidized bed of square cross-section

J. Zhou; J. R. Grace; S. Qin; C. M.H. Brereton; C. J. Lim; J. Zhu

doi:10.1016/0009-2509(94)E0125-A

Voidage profiles in a circulating fluidized bed of square cross-section

J. Zhou, J. R. Grace, S. Qin, C. M.H. Brereton, C. J. Lim, J. Zhu

Research output: Journal Publication › Article › peer-review

86 Citations (Scopus)

Abstract

Using an optical fiber particle concentration measuring system, an extensive study was carried out of voidage profiles in a circulating fluidized bed riser of square cross-section. Both lateral and axial voidage profiles were obtained. Particle concentration is not necessarily lowest at the axis of the riser, but may go through a minimum between the wall and the axis. The study also reveals the influence of the corners on the voidage profile. Because of the exit effect, profiles of voidage at the top of the riser are asymmetric. Bimodal and even trimodal probability distributions of particle concentration are found. The intermittency index is used to characterize the heterogeneity/homogeneity of the flow.

Original language	English
Pages (from-to)	3217-3226
Number of pages	10
Journal	Chemical Engineering Science
Volume	49
Issue number	19
DOIs	https://doi.org/10.1016/0009-2509(94)E0125-A
Publication status	Published - Oct 1994
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

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title = "Voidage profiles in a circulating fluidized bed of square cross-section",

abstract = "Using an optical fiber particle concentration measuring system, an extensive study was carried out of voidage profiles in a circulating fluidized bed riser of square cross-section. Both lateral and axial voidage profiles were obtained. Particle concentration is not necessarily lowest at the axis of the riser, but may go through a minimum between the wall and the axis. The study also reveals the influence of the corners on the voidage profile. Because of the exit effect, profiles of voidage at the top of the riser are asymmetric. Bimodal and even trimodal probability distributions of particle concentration are found. The intermittency index is used to characterize the heterogeneity/homogeneity of the flow.",

author = "J. Zhou and Grace, {J. R.} and S. Qin and Brereton, {C. M.H.} and Lim, {C. J.} and J. Zhu",

note = "Funding Information: Acknowledgement-Research funding from the Natural Sciencesa nd Engineering Research Council of Canada in support of this work is gratefulfy acknowledged.",

year = "1994",

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AU - Zhou, J.

AU - Grace, J. R.

AU - Qin, S.

AU - Brereton, C. M.H.

AU - Lim, C. J.

AU - Zhu, J.

N1 - Funding Information: Acknowledgement-Research funding from the Natural Sciencesa nd Engineering Research Council of Canada in support of this work is gratefulfy acknowledged.

PY - 1994/10

Y1 - 1994/10

N2 - Using an optical fiber particle concentration measuring system, an extensive study was carried out of voidage profiles in a circulating fluidized bed riser of square cross-section. Both lateral and axial voidage profiles were obtained. Particle concentration is not necessarily lowest at the axis of the riser, but may go through a minimum between the wall and the axis. The study also reveals the influence of the corners on the voidage profile. Because of the exit effect, profiles of voidage at the top of the riser are asymmetric. Bimodal and even trimodal probability distributions of particle concentration are found. The intermittency index is used to characterize the heterogeneity/homogeneity of the flow.

AB - Using an optical fiber particle concentration measuring system, an extensive study was carried out of voidage profiles in a circulating fluidized bed riser of square cross-section. Both lateral and axial voidage profiles were obtained. Particle concentration is not necessarily lowest at the axis of the riser, but may go through a minimum between the wall and the axis. The study also reveals the influence of the corners on the voidage profile. Because of the exit effect, profiles of voidage at the top of the riser are asymmetric. Bimodal and even trimodal probability distributions of particle concentration are found. The intermittency index is used to characterize the heterogeneity/homogeneity of the flow.

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DO - 10.1016/0009-2509(94)E0125-A

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ER -

Voidage profiles in a circulating fluidized bed of square cross-section

Abstract

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