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Numerical studies of displacement natural ventilation in multi-storey buildings connected to an atrium

Ji, Y and Cook, M 2007, 'Numerical studies of displacement natural ventilation in multi-storey buildings connected to an atrium' , Building Services Engineering Research and Technology, 28 (3) , pp. 207-222.

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    Abstract

    This paper describes computational fluid dynamics (CFD) simulations used to investigate displacement natural ventilation in simple multi-storey spaces connected to an atrium. The purpose of the work is to demonstrate the potential of CFD for modelling these airflows using solutions from simple mathematical models and salt bath experiments to provide an indication of the accuracy that can be attained. The storeys are connected to an atrium and air flows into them via top-down-chimneys. The driving force is provided by localised point heat sources on each floor which generate buoyant plumes that entrain the surrounding air and transport warm air upwards forming a warm, stratified layer in each storey. The mathematical models are used to describe the main flow features, such as stratification height, temperature gradient and ventilation flow rate. Results showed that, using the RNG k-epsilon" turbulence model, the predicted airflow patterns, temperature profiles and ventilation flow rates agreed favourably with the mathematical models, demonstrating the potential of using CFD for modelling buoyancy-driven displacement ventilation in multi-storey spaces connected to an atrium.

    Item Type: Article
    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: Building Services Engineering Research and Technology
    Publisher: SAGE
    Refereed: Yes
    ISSN: 0143-6244
    Related URLs:
    Depositing User: Dr Yingchun Ji
    Date Deposited: 27 May 2011 10:54
    Last Modified: 20 Aug 2013 17:52
    URI: http://usir.salford.ac.uk/id/eprint/15840

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