Abstract
This study presents the experimental results on cross-ventilation in a generic low-rise building placed in highly-dense urban configurations. Flow visualization studies were conducted by utilization of a smoke generator in order to investigate the nature of the flow pattern inside and around the cross-ventilated building. Moreover, distribution of the wind surface pressure coefficients over windward and leeward façades and internal walls of the target building were measured using a pressure tap system. Furthermore, the airflow rate crossing through the openings was measured using a tracer gas method. Different building configurations, representing highly-dense urban areas, as well as different wind angles were investigated in this study.Surprisingly, the experimental results reveal a noticeable difference between the mechanism of cross-ventilation in moderately-dense and highly-dense buildings arrangements. A clear leeward jet with a highly-transient nature can be observed, which is generated due to a leeward vortex formed by the target and downstream buildings. As another novel finding of this study, the cross-ventilation is understood to be highly transient in highly-dense urban areas with a strong periodic fresh air pulsation through the windward and leeward openings. This behavior is fundamentally far from the steady state models considered for such cross-ventilation scenarios in literature.
Highlights
Rapid growth of urbanization and population in recent years has resulted in emerging large numbers of mega cities with highly-dense urban areas (OECD, 2012)
A series of wind tunnel measurements were conducted to study the cross-ventilation through generic form low-rise buildings
Buildings were placed in a regular arrangement with very dense urban configurations exposed against different wind angles
Summary
Rapid growth of urbanization and population in recent years has resulted in emerging large numbers of mega cities with highly-dense urban areas (OECD, 2012). In the numerical studies such as the one by (Shuhaimi et al, 2017), the cross-ventilation of a group of generic building forms with higher planar area ratio of 0.25, 0.35, and 0.5 are simulated using steady Reynolds-averaged Navier Stoke (SRANS) models These simulation studies have only been validated using wind tunnel experimental data for an unsheltered building case studies (Ohba et al, 2001).
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Wind Engineering and Industrial Aerodynamics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
