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Vertical wind profile distribution within canopy layer based on representative geometry model using wind tunnel

S A Zaki1, Y M H'ng2, A F Mohammad2

  • 1Department of Mechanical Precision Engineering, Malaysia-Japan International Institute of Technology, Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra , 54100, Kuala Lumpur, Malaysia. sheikh.kl@utm.my.

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Building layout and wind direction significantly impact wind speed distribution within tropical urban campuses. This study analyzed wind flow around high-rise buildings, revealing key factors influencing turbulent wind patterns.

Keywords:
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Area of Science:

  • Urban Climatology
  • Environmental Engineering
  • Fluid Dynamics

Background:

  • Urban environments, particularly tropical campuses, experience complex wind flow patterns due to high-rise structures.
  • Understanding wind speed distribution is crucial for pedestrian comfort, building design, and air quality in urban areas.

Purpose of the Study:

  • To investigate the mean and turbulent wind speed distribution within the canopy height of a tropical urban campus.
  • To analyze the influence of high-rise buildings and their layout on vertical wind profiles.
  • To examine the effects of wind direction and building geometry on wind flow dynamics.

Main Methods:

  • Wind tunnel experiments were conducted using a representative geometry model of a tropical urban campus.
  • Vertical wind profiles were analyzed around two specific high-rise buildings (Menara Razak and Residensi Tower).
  • Data on mean wind speed (u), root mean square (u_rms), and skewness (SK) were collected and analyzed for different wind directions (22.5° and 202.5°).

Main Results:

  • Building layout was found to significantly influence wind speed distribution within the campus.
  • Approaching wind flow direction affected wind flow interaction with the buildings.
  • The height of the target building (H) determined the extent of vortex influence in the wake flow, affecting up to H for Menara Razak and 1.5H for Residensi Tower.

Conclusions:

  • The arrangement of buildings in an urban campus is a critical factor in determining wind speed distribution at canopy level.
  • Wind direction plays a significant role in how wind interacts with urban structures.
  • Building height influences the spatial extent of turbulent wake effects, impacting the surrounding microclimate.