Paper Conference

Proceedings of ASim Conference 2014: 2nd Asia conference of IBPSA-China, Japan, Korea

     

CFD Study of Cross Ventilation Performance of Different Buildings Layouts

Nur Farhana Mohamad Kasim, Sheikh Ahmad Zaki Shaikh Salim, Aya Hagishima, Mat Ali Mohamed Sukri, Masataka Shirakasi, Norio Arai, Azli Abd Razak

Abstract: The wind-induced ventilation performance of a building could be negatively affected by neighbouring buildings. It is therefore important to study the impact of surrounding buildings on wind flow, in order to design an effective cross ventilation system. Based on a model validation exercise, Reynolds averaged Navier-Stokes (RANS) approach was used with the SST k-ω model, and applied to a simplified cubic model with two opposite door-like openings; this model was then placed in square and staggered arrays. The results obtained were compared to those of the isolated building. Analysis of ventilation performance of different building positions within each array showed attenuation in the flow rate as the number of upstream buildings increased in a streamwise direction. However, buildings arranged in a staggered array appeared to experience higher flow rates than those in the square layout. The results of this study therefore suggest that the surrounding buildings layout has significant influence on the efficiency of wind-induced ventilation.
Keywords: Wind-induced Ventilation, Cross Ventilation, Computational Fluid Dynamics, RANS, Buildings Layout
Pages: 131 - 138
Paper:
asim2014_012_a2-28-328