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Scalar Fluxes Near a Tall Building in an Aligned Array of Rectangular Buildings
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 ta...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Netherlands
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6566286/ https://www.ncbi.nlm.nih.gov/pubmed/31258156 http://dx.doi.org/10.1007/s10546-017-0308-4 |
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author | Fuka, Vladimír Xie, Zheng-Tong Castro, Ian P. Hayden, Paul Carpentieri, Matteo Robins, Alan G. |
author_facet | Fuka, Vladimír Xie, Zheng-Tong Castro, Ian P. Hayden, Paul Carpentieri, Matteo Robins, Alan G. |
author_sort | Fuka, Vladimír |
collection | PubMed |
description | 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 are dominant, whereas the tall building produces an increase of the magnitude of advective scalar fluxes that yields 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. |
format | Online Article Text |
id | pubmed-6566286 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Springer Netherlands |
record_format | MEDLINE/PubMed |
spelling | pubmed-65662862019-06-28 Scalar Fluxes Near a Tall Building in an Aligned Array of Rectangular Buildings Fuka, Vladimír Xie, Zheng-Tong Castro, Ian P. Hayden, Paul Carpentieri, Matteo Robins, Alan G. Boundary Layer Meteorol Research Article 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 are dominant, whereas the tall building produces an increase of the magnitude of advective scalar fluxes that yields 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. Springer Netherlands 2017-11-04 2018 /pmc/articles/PMC6566286/ /pubmed/31258156 http://dx.doi.org/10.1007/s10546-017-0308-4 Text en © The Author(s) 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), 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. |
spellingShingle | Research Article Fuka, Vladimír Xie, Zheng-Tong Castro, Ian P. Hayden, Paul Carpentieri, Matteo Robins, Alan G. Scalar Fluxes Near a Tall Building in an Aligned Array of Rectangular Buildings |
title | Scalar Fluxes Near a Tall Building in an Aligned Array of Rectangular Buildings |
title_full | Scalar Fluxes Near a Tall Building in an Aligned Array of Rectangular Buildings |
title_fullStr | Scalar Fluxes Near a Tall Building in an Aligned Array of Rectangular Buildings |
title_full_unstemmed | Scalar Fluxes Near a Tall Building in an Aligned Array of Rectangular Buildings |
title_short | Scalar Fluxes Near a Tall Building in an Aligned Array of Rectangular Buildings |
title_sort | scalar fluxes near a tall building in an aligned array of rectangular buildings |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6566286/ https://www.ncbi.nlm.nih.gov/pubmed/31258156 http://dx.doi.org/10.1007/s10546-017-0308-4 |
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