Computational study of the effects of material properties on heat transfer in gas fluidization

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Heat transfer characteristics of different powders in gas fluidization are investigated by means of a combined approach of discrete element method and computational fluid dynamics. First, the heat transfer characteristics in three flow regimes of group A powders are examined. Then, the effects of the Hamaker constant and particle size, both related to the van der Waals force, are investigated in detail. The results confirm that the convective heat transfer is dominant, and radiative heat transfer becomes important when the bed temperature is high. However, conductive heat transfer also plays a role depending on the flow regimes and material properties. Significant effects of the Hamaker constant and particle size are observed under certain conditions. Finally, an effort is made to quantify the effects of the Hamaker constant, particle size, and inlet gas velocity. The findings should be useful for better understanding and prediction of the heat transfer in gas fluidization.
Original languageEnglish
Pages (from-to)11572 - 11586
Number of pages15
JournalIndustrial and Engineering Chemistry Research
Volume20
Issue number.2
DOIs
Publication statusPublished - 2012
Externally publishedYes

Cite this

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title = "Computational study of the effects of material properties on heat transfer in gas fluidization",
abstract = "Heat transfer characteristics of different powders in gas fluidization are investigated by means of a combined approach of discrete element method and computational fluid dynamics. First, the heat transfer characteristics in three flow regimes of group A powders are examined. Then, the effects of the Hamaker constant and particle size, both related to the van der Waals force, are investigated in detail. The results confirm that the convective heat transfer is dominant, and radiative heat transfer becomes important when the bed temperature is high. However, conductive heat transfer also plays a role depending on the flow regimes and material properties. Significant effects of the Hamaker constant and particle size are observed under certain conditions. Finally, an effort is made to quantify the effects of the Hamaker constant, particle size, and inlet gas velocity. The findings should be useful for better understanding and prediction of the heat transfer in gas fluidization.",
author = "Qinfu Hou and Zongyan Zhou and Aibing Yu",
year = "2012",
doi = "10.1021/ie3015999",
language = "English",
volume = "20",
pages = "11572 -- 11586",
journal = "Industrial and Engineering Chemistry Research",
issn = "0888-5885",
number = ".2",

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Computational study of the effects of material properties on heat transfer in gas fluidization. / Hou, Qinfu; Zhou, Zongyan; Yu, Aibing.

In: Industrial and Engineering Chemistry Research, Vol. 20, No. .2, 2012, p. 11572 - 11586.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Computational study of the effects of material properties on heat transfer in gas fluidization

AU - Hou, Qinfu

AU - Zhou, Zongyan

AU - Yu, Aibing

PY - 2012

Y1 - 2012

N2 - Heat transfer characteristics of different powders in gas fluidization are investigated by means of a combined approach of discrete element method and computational fluid dynamics. First, the heat transfer characteristics in three flow regimes of group A powders are examined. Then, the effects of the Hamaker constant and particle size, both related to the van der Waals force, are investigated in detail. The results confirm that the convective heat transfer is dominant, and radiative heat transfer becomes important when the bed temperature is high. However, conductive heat transfer also plays a role depending on the flow regimes and material properties. Significant effects of the Hamaker constant and particle size are observed under certain conditions. Finally, an effort is made to quantify the effects of the Hamaker constant, particle size, and inlet gas velocity. The findings should be useful for better understanding and prediction of the heat transfer in gas fluidization.

AB - Heat transfer characteristics of different powders in gas fluidization are investigated by means of a combined approach of discrete element method and computational fluid dynamics. First, the heat transfer characteristics in three flow regimes of group A powders are examined. Then, the effects of the Hamaker constant and particle size, both related to the van der Waals force, are investigated in detail. The results confirm that the convective heat transfer is dominant, and radiative heat transfer becomes important when the bed temperature is high. However, conductive heat transfer also plays a role depending on the flow regimes and material properties. Significant effects of the Hamaker constant and particle size are observed under certain conditions. Finally, an effort is made to quantify the effects of the Hamaker constant, particle size, and inlet gas velocity. The findings should be useful for better understanding and prediction of the heat transfer in gas fluidization.

UR - http://pubs.acs.org.ezproxy.lib.monash.edu.au/doi/pdf/10.1021/ie3015999

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EP - 11586

JO - Industrial and Engineering Chemistry Research

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SN - 0888-5885

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