Nezis, A.; Assimakopoulos, V.D.; Bergeles, G.
Year:
2008
Bibliographic info:
29th AIVC Conference " Advanced building ventilation and environmental technology for addressing climate change issues", Kyoto, Japan, 14-16 October 2008

Prediction and visualisation of wind flow andpollutant dispersion in urban, densely built areasis necessary for city planners and engineers inorder to regulate and monitor successfully thelocal air quality. Wind vortices, low pressurezones and channelling effects may affect theventilation characteristics of street canyonsunder different meteorological conditions. Inthis respect physical and mathematical modelsare employed which are able to provide insightinto passive cooling techniques for buildingslocated in densely built up areas. Experiments ina wind tunnel can be easily and quickly carriedout since parameters such as the wind field andtemperature can be controlled as opposed tofield experiments. The purpose of the presentwork is to study the mean and turbulentcharacteristics of the two dimensional flow fielddeveloped under neutral and unstablestratification conditions, within and above anurban street canyon.