Natural ventilation in cities: the implications of fluid mechanics
Building Research & Information
Taylor & Francis
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Song, J., Lin, W., Mottet, L., Woodward, H., Davies Wykes, M., Arcucci, R., Xiao, D., et al. (2018). Natural ventilation in cities: the implications of fluid mechanics. Building Research & Information, 46 (8), 809-828. https://doi.org/10.1080/09613218.2018.1468158
Research under the Managing Air for Green Inner Cities (MAGIC) project uses measurements and modelling to investigate the connections between external and internal conditions: the impact of urban airflow on the natural ventilation of a building. The test site was chosen so that under different environmental conditions the levels of external pollutants entering the building, from either a polluted road or a relatively clean courtyard, would be significantly different. Measurements included temperature, relative humidity, local wind and solar radiation, together with levels of carbon monoxide (CO) and carbon dioxide (CO2) both inside and outside the building to assess the indoor–outdoor exchange flows. Building ventilation took place through windows on two sides, allowing for single-sided and crosswind-driven ventilation, and also stack-driven ventilation in low wind conditions. The external flow around the test site was modelled in an urban boundary layer in a wind tunnel. The wind tunnel results were incorporated in a large-eddy-simulation model, Fluidity, and the results compared with monitoring data taken both within the building and from the surrounding area. In particular, the effects of street layout and associated street canyons, of roof geometry and the wakes of nearby tall buildings were examined.
This work was supported by the Engineering and Physical Sciences Research Council (EPSRC) Grand Challenge grant ‘Managing Air for Green Inner Cities (MAGIC) [grant number EP/N010221/1].
Engineering and Physical Sciences Research Council (EP/N010221/1)
Engineering and Physical Sciences Research Council (EP/N009797/1)
External DOI: https://doi.org/10.1080/09613218.2018.1468158
This record's URL: https://www.repository.cam.ac.uk/handle/1810/282862