TY - JOUR
T1 - 3D real-time volumetric particle tracking velocimetry – A promising tool for studies of airflow around high-rise buildings
AU - Zhao, Yu
AU - Ma, Xiaojun
AU - Zhang, Chengbin
AU - Wang, Haoyu
AU - Zhang, Yuanhui
N1 - Funding Information:
The authors acknowledge the support from National Natural Science Foundation of China (Grant No. 51578065) and National Natural Science Foundation of Beijing (Grant No. 8182019) to Dr. Xiaojun Ma and Dr. Haoyu Wang respectively, to allow their collaboration and visiting abroad.
Funding Information:
The authors acknowledge the support from National Natural Science Foundation of China (Grant No. 51578065 ) and National Natural Science Foundation of Beijing (Grant No. 8182019 ) to Dr. Xiaojun Ma and Dr. Haoyu Wang respectively, to allow their collaboration and visiting abroad.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/7
Y1 - 2020/7
N2 - Airflow patterns around high-rise buildings affect building wind environment (BWE) including infiltration/exfiltration, heating/cooling loads and internal environment. Scaled high-rise building models are usually placed in a wind tunnel to study BWE. However, measuring 3D flow patterns around scaled high-rise buildings in real-time is a challenge. In this study, a 3D real-time Volumetric Particle Tracking Velocimetry (VPTV) system was used to measure the airflows around three different scaled-building setups: single building, double building parallel to the wind, and double building perpendicular to the wind. Trajectories in Lagrangian coordinates system were tracked and then interpolated to generate 3D Eulerian description of the flow field. In this study, the relative errors of velocities measured by VPTV were smaller than 2% for magnitudes range from 0.025 m/s to 2.2 m/s. The local velocity magnitudes measured by hot-wire anemometer and CFD at selected positions were compared with VPTV measurement with relative error 26.2% and 16.3% respectively. Finally, measured streamlines and reattachment lengths were compared with CFD simulation at selected plane. Results show that the VPTV system is capable of capturing detailed and accurate data of airflow around scaled high-rise building models.
AB - Airflow patterns around high-rise buildings affect building wind environment (BWE) including infiltration/exfiltration, heating/cooling loads and internal environment. Scaled high-rise building models are usually placed in a wind tunnel to study BWE. However, measuring 3D flow patterns around scaled high-rise buildings in real-time is a challenge. In this study, a 3D real-time Volumetric Particle Tracking Velocimetry (VPTV) system was used to measure the airflows around three different scaled-building setups: single building, double building parallel to the wind, and double building perpendicular to the wind. Trajectories in Lagrangian coordinates system were tracked and then interpolated to generate 3D Eulerian description of the flow field. In this study, the relative errors of velocities measured by VPTV were smaller than 2% for magnitudes range from 0.025 m/s to 2.2 m/s. The local velocity magnitudes measured by hot-wire anemometer and CFD at selected positions were compared with VPTV measurement with relative error 26.2% and 16.3% respectively. Finally, measured streamlines and reattachment lengths were compared with CFD simulation at selected plane. Results show that the VPTV system is capable of capturing detailed and accurate data of airflow around scaled high-rise building models.
KW - Building wind environment
KW - Flow pattern measurement
KW - Real-time
KW - Volumetric particle tracking velocimetry (VPTV)
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U2 - 10.1016/j.buildenv.2020.106930
DO - 10.1016/j.buildenv.2020.106930
M3 - Article
AN - SCOPUS:85084410445
VL - 178
JO - Building and Environment
JF - Building and Environment
SN - 0360-1323
M1 - 106930
ER -