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Numerical simulation of transient flow development in a naturally ventilated room

Kaye, N, Ji, Y and Cook, M 2009, 'Numerical simulation of transient flow development in a naturally ventilated room' , Building and Environment, 44 (5) , pp. 889-897.

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Abstract

Numerical simulations were conducted to model the transient flow development in a naturally ventilated space containing a centrally located localized source of heat. The simulations were compared with a series of small-scale laboratory experiments and existing theoretical models. The aim of the work was to benchmark CFD models for time-dependent buoyancy-driven natural ventilation against previously published experimental results and theoretical models. The simulations agree well with experimental results during the initial development of the room stratification. The CFD results accurately predict the maximum depth of the hot buoyant layer at the top of the room as well as the steady-state interface height which separates the warm upper buoyant layer from the cooler air below. The simulations also predict well the time taken for the buoyant upper layer to reach its maximum depth. However, at longer times the results diverge. This may be due to thermal diffusion and mixing at the interface between the upper and lower layers due to the inflow from the floor level vents.

Item Type: Article
Uncontrolled Keywords: Natural ventilation, CFD simulation, flow development, transient flow
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 and Environment
Publisher: Elsevier
Refereed: Yes
ISSN: 03601323
Related URLs:
Depositing User: Dr Yingchun Ji
Date Deposited: 27 May 2011 09:42
Last Modified: 21 Jul 2014 09:30
URI: http://usir.salford.ac.uk/id/eprint/11434

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