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Scalar fluxes near a tall building in an aligned array of rectangular buildings

Fuka, V, Xie, Z-T, Castro, P, Hayden, Paul, Carpentieri, Matteo and Robins, Alan (2018) Scalar fluxes near a tall building in an aligned array of rectangular buildings Boundary Layer Meteorology, 167 (1). pp. 53-76.

10.1007%2Fs10546-017-0308-4.pdf - Version of Record

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Scalar dispersion from ground-level sources in arrays of buildings is investigated using wind-tunnel measurements and large-eddy simulation (LES). An array of uniform-height buildings of equal dimensions and an array with an additional single tall building (wind tunnel) or a periodically repeated tall building (LES) are considered. The buildings in the array are aligned and form long streets. The sensitivity of the dispersion pattern to small changes in wind direction is demonstrated. Vertical scalar fluxes are decomposed into the advective and turbulent parts and the influences of wind direction and of the presence of the tall building on the scalar flux components are evaluated. In the uniform-height array turbulent scalar fluxes were dominant, whereas the tall building causes an increase of the magnitude of advective scalar fluxes which become the largest component. The presence of the tall building causes either an increase or a decrease to the total vertical scalar flux depending on the position of the source with respect to the tall building. The results of the simulations can be used to develop parametrizations for street canyon dispersion models and enhance their capabilities in areas with tall buildings.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Fuka, V
Xie, Z-T
Castro, P
Date : April 2018
DOI : 10.1007/s10546-017-0308-4
Copyright Disclaimer : © The Author(s) 2017. This article is an open access publication. The final publication is available at Springer via This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Uncontrolled Keywords : Atmospheric dispersion; Large-eddy simulation; Tall building
Depositing User : Melanie Hughes
Date Deposited : 19 Sep 2017 11:35
Last Modified : 16 Aug 2019 15:36

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