Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Ventilation in a street canyon under diurnal heating conditions

Liu, Jing, Luo, Zhiwen ORCID:, Zhao, Taoyao and Shui, Jing 2012. Ventilation in a street canyon under diurnal heating conditions. International Journal of Ventilation 11 (2) , pp. 141-154. 10.1080/14733315.2012.11683977

Full text not available from this repository.


To study the thermal effects on airflow in a street canyon under real heating conditions (due to diurnal solar radiation), a one-way static approach combining an urban canopy model and CFD is proposed in this paper. An urban canopy model was developed to calculate the individual temperatures of surfaces in the street canyon. The calculated surface temperature may be used as a thermal boundary for CFD simulation. The reliability of this model was validated against a field experiment in Harbin, China. Using the coupling calculation method, the wind flow and air exchange process inside an idealized street canyon was studied. The simulation results show that the thermal effect has significant impacts on the transfer process in the street canyon, especially when the approaching wind is weak. Under a real diurnal thermal forcing, the flow structure within the street canyon changes from one primary vortex to two counter-rotating vortices. The change of transfer process, induced by the buoyancy force, was determined by the thermal condition of all surfaces rather than a single one.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Architecture
Publisher: Taylor and Francis Group
ISSN: 1473-3315
Last Modified: 10 Nov 2022 11:45

Citation Data

Cited 10 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item