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

Ji, Y; Cook, M

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.

Citation

multi-storey buildings connected to an atrium. Building Services Engineering Research and Technology, 28(3), 207-222. https://doi.org/10.1177/0143624407077190

• Journal Article Type: Article
• Publication Date: Aug 1, 2007
• Deposit Date: May 27, 2011
• Journal: Building Services Engineering Research and Technology
• Print ISSN: 0143-6244
• Publisher: SAGE Publications
• Peer Reviewed: Peer Reviewed
• Volume: 28
• Issue: 3
• Pages: 207-222
• DOI: https://doi.org/10.1177/0143624407077190
• Publisher URL: http://dx.doi.org/10.1177/0143624407077190