Towards time-averaged CFD modelling of circulating fluidized beds

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

6 Citations (Scopus)

Abstract

In case of large CFBs, steady state CFD simulation can be an attractive alternative for the time-consuming transient simulations. In the paper, the features of equation closure of a steady state model are evaluated on basis of a transient 3D simulation. The computational results are analysed to determine the averaged flow properties and the main fluctuating components and their correlations. The main terms to be modelled for the steady state approach are, according to this analysis, the average gas-particle drag force and the Reynolds stresses arising from velocity fluctuations. Suggestions for approaches for steady state equation closure in case of industrial CFB applications are discussed.
Original languageEnglish
Title of host publicationProceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9
EditorsJoachim Werther
Place of PublicationHamburg
Pages259-264
Publication statusPublished - 2008
MoE publication typeA4 Article in a conference publication
Event9th International Conference on Circulating Fluidized Beds, CFB9 - Hamburg, Germany
Duration: 13 May 200816 May 2008

Conference

Conference9th International Conference on Circulating Fluidized Beds, CFB9
Abbreviated titleCFB9
CountryGermany
CityHamburg
Period13/05/0816/05/08

Fingerprint

Fluidized beds
Computational fluid dynamics
Industrial applications
Drag
Gases

Keywords

  • CFD
  • Circulating fluidized bed
  • Time averaging

Cite this

Kallio, S., Taivassalo, V., & Hyppänen, T. (2008). Towards time-averaged CFD modelling of circulating fluidized beds. In J. Werther (Ed.), Proceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9 (pp. 259-264). Hamburg.
Kallio, Sirpa ; Taivassalo, Veikko ; Hyppänen, Timo. / Towards time-averaged CFD modelling of circulating fluidized beds. Proceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9. editor / Joachim Werther. Hamburg, 2008. pp. 259-264
@inproceedings{cbf62f73570b4aeaa0f4d3fa0fcd5c6f,
title = "Towards time-averaged CFD modelling of circulating fluidized beds",
abstract = "In case of large CFBs, steady state CFD simulation can be an attractive alternative for the time-consuming transient simulations. In the paper, the features of equation closure of a steady state model are evaluated on basis of a transient 3D simulation. The computational results are analysed to determine the averaged flow properties and the main fluctuating components and their correlations. The main terms to be modelled for the steady state approach are, according to this analysis, the average gas-particle drag force and the Reynolds stresses arising from velocity fluctuations. Suggestions for approaches for steady state equation closure in case of industrial CFB applications are discussed.",
keywords = "CFD, Circulating fluidized bed, Time averaging",
author = "Sirpa Kallio and Veikko Taivassalo and Timo Hypp{\"a}nen",
year = "2008",
language = "English",
isbn = "978-3-930400-57-7",
pages = "259--264",
editor = "Werther, {Joachim }",
booktitle = "Proceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9",

}

Kallio, S, Taivassalo, V & Hyppänen, T 2008, Towards time-averaged CFD modelling of circulating fluidized beds. in J Werther (ed.), Proceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9. Hamburg, pp. 259-264, 9th International Conference on Circulating Fluidized Beds, CFB9, Hamburg, Germany, 13/05/08.

Towards time-averaged CFD modelling of circulating fluidized beds. / Kallio, Sirpa; Taivassalo, Veikko; Hyppänen, Timo.

Proceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9. ed. / Joachim Werther. Hamburg, 2008. p. 259-264.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Towards time-averaged CFD modelling of circulating fluidized beds

AU - Kallio, Sirpa

AU - Taivassalo, Veikko

AU - Hyppänen, Timo

PY - 2008

Y1 - 2008

N2 - In case of large CFBs, steady state CFD simulation can be an attractive alternative for the time-consuming transient simulations. In the paper, the features of equation closure of a steady state model are evaluated on basis of a transient 3D simulation. The computational results are analysed to determine the averaged flow properties and the main fluctuating components and their correlations. The main terms to be modelled for the steady state approach are, according to this analysis, the average gas-particle drag force and the Reynolds stresses arising from velocity fluctuations. Suggestions for approaches for steady state equation closure in case of industrial CFB applications are discussed.

AB - In case of large CFBs, steady state CFD simulation can be an attractive alternative for the time-consuming transient simulations. In the paper, the features of equation closure of a steady state model are evaluated on basis of a transient 3D simulation. The computational results are analysed to determine the averaged flow properties and the main fluctuating components and their correlations. The main terms to be modelled for the steady state approach are, according to this analysis, the average gas-particle drag force and the Reynolds stresses arising from velocity fluctuations. Suggestions for approaches for steady state equation closure in case of industrial CFB applications are discussed.

KW - CFD

KW - Circulating fluidized bed

KW - Time averaging

M3 - Conference article in proceedings

SN - 978-3-930400-57-7

SP - 259

EP - 264

BT - Proceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9

A2 - Werther, Joachim

CY - Hamburg

ER -

Kallio S, Taivassalo V, Hyppänen T. Towards time-averaged CFD modelling of circulating fluidized beds. In Werther J, editor, Proceedings of the 9th International Conference on Circulating Fluidized Beds, CFB-9. Hamburg. 2008. p. 259-264