TY - JOUR
T1 - Analysis of airflow over building arrays for assessment of urban wind environment
AU - Abd Razak, Azli
AU - Hagishima, Aya
AU - Ikegaya, Naoki
AU - Tanimoto, Jun
N1 - Funding Information:
The authors wish to express their gratitude to Dr. Kono and Professor Kubota for providing data sets that have been valuable in the validation of our work. This research was financially supported by a grant-in aid for scientific research ( 22360238 ) from the Ministry of Education, Science and Culture of Japan and the Asahi glass foundation . The computations were performed at the Research Institute for Information Technology, Kyushu University.
PY - 2013/1
Y1 - 2013/1
N2 - Large eddy simulation (LES) of the airflows around various types of block arrays was performed to estimate the pedestrian wind environment. Five types of uniform staggered block arrays with different aspect ratios and an array with a nonuniform height were selected for the simulations. The simulation accuracy was validated by comparing the drag coefficient and wind profiles with those of previous work. The characteristics of the spatially averaged mean wind profiles of the arrays were analyzed on the basis of the calculation results. This study reveals that the frontal area ratio, which is the product of the plan area ratio and building aspect ratio, is the most important parameter in estimating the pedestrian wind environment. In addition, a simple exponential equation was derived for predicting the pedestrian wind speed as a function of the frontal area ratio, which is applicable to various building aspect ratios and amounts of height variability.
AB - Large eddy simulation (LES) of the airflows around various types of block arrays was performed to estimate the pedestrian wind environment. Five types of uniform staggered block arrays with different aspect ratios and an array with a nonuniform height were selected for the simulations. The simulation accuracy was validated by comparing the drag coefficient and wind profiles with those of previous work. The characteristics of the spatially averaged mean wind profiles of the arrays were analyzed on the basis of the calculation results. This study reveals that the frontal area ratio, which is the product of the plan area ratio and building aspect ratio, is the most important parameter in estimating the pedestrian wind environment. In addition, a simple exponential equation was derived for predicting the pedestrian wind speed as a function of the frontal area ratio, which is applicable to various building aspect ratios and amounts of height variability.
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U2 - 10.1016/j.buildenv.2012.08.007
DO - 10.1016/j.buildenv.2012.08.007
M3 - Article
AN - SCOPUS:84870439298
SN - 0360-1323
VL - 59
SP - 56
EP - 65
JO - Building and Environment
JF - Building and Environment
ER -