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CFD modelling of natural ventilation: combined wind and buoyancy forces

Cook, M, Ji, Y and Hunt, G 2003, 'CFD modelling of natural ventilation: combined wind and buoyancy forces' , The International Journal of Ventilation, 1 (3) , pp. 169-180.

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    Abstract

    Results of a CFD simulation of the wind-assisted stack ventilation of a single-storey enclosure with high and low-level ventilation openings are presented and compared with both the laboratory measurements and the analytical model of the flow and thermal stratification developed by Hunt and Linden (2001). Comparisons show that close quantitative agreement is obtained between the thermal stratification predicted by the CFD and the analytical model and experimental measurements. A key consideration in the CFD modelling work is how to specify appropriate boundary conditions at the inlet and outlet locations of the enclosure. This paper investigates the use of constant pressure boundary conditions imposed over an opening whose physical area has been reduced to account for the effects of discharge and expansion. The close agreement with the analytical predictions and experimental results gives confidence in this approach and offers guidance on how to model wind-assisted stack ventilation flows using CFD.

    Item Type: Article
    Uncontrolled Keywords: CFD, natural ventilation, wind, buoyancy, analytical model, salt-bath experiment, comparisons
    Themes: Built and Human Environment
    Schools: Colleges and Schools > College of Science & Technology
    Colleges and Schools > College of Science & Technology > School of the Built Environment
    Colleges and Schools > College of Science & Technology > School of the Built Environment > Urban Quality Research Centre (UQRC)
    Journal or Publication Title: The International Journal of Ventilation
    Publisher: VEETCH Ltd
    Refereed: Yes
    ISSN: 1473-3315
    Related URLs:
    Depositing User: Dr Yingchun Ji
    Date Deposited: 27 May 2011 11:20
    Last Modified: 20 Aug 2013 17:52
    URI: http://usir.salford.ac.uk/id/eprint/15841

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