Techno Press
Techno Press

Wind and Structures   Volume 9, Number 6, November 2006, pages 473-492
Reliability of numerical computation of pedestrian-level wind environment around a row of tall buildings
K. M. Lam and A. P. To

Abstract     [Full Text]
    This paper presents numerical results of pedestrian-level wind environment around the base of a row of tall buildings by CFD. Four configurations of building arrangement are computed including a single square tall building. Computed results of pedestrian-level wind flow patterns and wind speeds are compared to previous wind tunnel measurement data to enable an assessment of CFD predictions. The CFD model uses the finite-volume method with RNG k-e model for turbulence closure. It is found that the numerical results can reproduce key features of pedestrian-level wind environment such as corner streams around corners of upwind building, sheltered zones behind buildings and channeled high-speed flow through a building gap. However, there are some differences between CFD results and wind tunnel data in the wind speed distribution and locations of highest wind speeds inside the corner streams. In locations of high ground-level wind speeds, CFD values match wind tunnel data within ?0%.
Key Words
    CFD; pedestrian-level winds; wind environment; building interaction.
K. M. Lam; Department of Civil Engineering, University of Hong Kong, Pokfulam Road, Hong KongrnA. P. To; Ove Arup & Partners Hong Kong Limited, 5/F, Festival Walk, Tat Chee Avenue, Kowloon Tong, Hong Kong

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