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Outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions

This paper explores the pedestrian-level wind environment around two buildings of unequal heights for the effects of ratio of height of upwind building to that of downwind building, referred to as buildings height ratio, spacing distance between the buildings, and direction of ambient wind, on the o...

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Main Authors: Ayo, Samuel Adinoyi, Mohd. Ghazali, Normah, Mansor, Shuhaimi
Format: Article
Published: Tsinghua University Press 2015
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/58739/
http://dx.doi.org/10.1007/s12273-014-0195-2
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spelling my.utm.587392021-12-08T08:51:25Z http://eprints.utm.my/id/eprint/58739/ Outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions Ayo, Samuel Adinoyi Mohd. Ghazali, Normah Mansor, Shuhaimi TJ Mechanical engineering and machinery This paper explores the pedestrian-level wind environment around two buildings of unequal heights for the effects of ratio of height of upwind building to that of downwind building, referred to as buildings height ratio, spacing distance between the buildings, and direction of ambient wind, on the outdoor air ventilation. The objective is to propose appropriate spacing distances for various configurations of this type of buildings layout in a suburban area of Kuala Lumpur, which would enable harnessing the full ventilation potential of the local wind conditions. A three-dimensional numerical technique employing computational fluid dynamics simulation of continuity and Reynolds-Averaged Navier-Stokes equations was used to study the turbulent flow field around the full-scale sizes of the buildings. Results indicate the influence of spacing distance between buildings, relative heights of the buildings and direction of ambient wind on outdoor ventilation. Results also show that 3-D turbulent flow processes such as lateral and secondary flows play significant roles in defining the wind flow pattern and ventilation availability. The perpendicular wind direction presents remarkable adverse effects compared to the inclined direction, while a higher upwind building height which would ordinarily be expected to proportionally obstruct wind flow could be of advantage, at low values of building height ratios, in enhancing outdoor ventilation. The findings established the need to give consideration to climatic factors such as wind flow and direction in planning urban cities, as it affects buildings to be situated in close proximity, especially when there is height difference. Tsinghua University Press 2015 Article PeerReviewed Ayo, Samuel Adinoyi and Mohd. Ghazali, Normah and Mansor, Shuhaimi (2015) Outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions. Building Simulation, 8 (1). pp. 81-98. ISSN 1996-3599 http://dx.doi.org/10.1007/s12273-014-0195-2 DOI:10.1007/s12273-014-0195-2
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Ayo, Samuel Adinoyi
Mohd. Ghazali, Normah
Mansor, Shuhaimi
Outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions
description This paper explores the pedestrian-level wind environment around two buildings of unequal heights for the effects of ratio of height of upwind building to that of downwind building, referred to as buildings height ratio, spacing distance between the buildings, and direction of ambient wind, on the outdoor air ventilation. The objective is to propose appropriate spacing distances for various configurations of this type of buildings layout in a suburban area of Kuala Lumpur, which would enable harnessing the full ventilation potential of the local wind conditions. A three-dimensional numerical technique employing computational fluid dynamics simulation of continuity and Reynolds-Averaged Navier-Stokes equations was used to study the turbulent flow field around the full-scale sizes of the buildings. Results indicate the influence of spacing distance between buildings, relative heights of the buildings and direction of ambient wind on outdoor ventilation. Results also show that 3-D turbulent flow processes such as lateral and secondary flows play significant roles in defining the wind flow pattern and ventilation availability. The perpendicular wind direction presents remarkable adverse effects compared to the inclined direction, while a higher upwind building height which would ordinarily be expected to proportionally obstruct wind flow could be of advantage, at low values of building height ratios, in enhancing outdoor ventilation. The findings established the need to give consideration to climatic factors such as wind flow and direction in planning urban cities, as it affects buildings to be situated in close proximity, especially when there is height difference.
format Article
author Ayo, Samuel Adinoyi
Mohd. Ghazali, Normah
Mansor, Shuhaimi
author_facet Ayo, Samuel Adinoyi
Mohd. Ghazali, Normah
Mansor, Shuhaimi
author_sort Ayo, Samuel Adinoyi
title Outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions
title_short Outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions
title_full Outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions
title_fullStr Outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions
title_full_unstemmed Outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions
title_sort outdoor ventilation performance of various configurations of a layout of two adjacent buildings under isothermal conditions
publisher Tsinghua University Press
publishDate 2015
url http://eprints.utm.my/id/eprint/58739/
http://dx.doi.org/10.1007/s12273-014-0195-2
_version_ 1720436887998431232
score 13.211869

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