Reduced-order modelling of urban wind environment and gaseous pollutants dispersion in an urban-scale street canyon

Hazardous chemical gases will spread rapidly after leakage. For emergency response to that, people need to obtain the information of wind and pollutant in time. However, it takes a lot of time to calculate the flow in large-scale urban areas by numerical simulation. Therefore, reduced-order model(RO...

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Autores principales:	Shan Ding, Rui Yang
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2021
Materias:	Finite volume method Reduced-order modelling Proper orthogonal decomposition Interpolation Radial basis functions Risk in industry. Risk management HD61
Acceso en línea:	https://doaj.org/article/36d55b6034cf4231a0d9015512e63306
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id	oai:doaj.org-article:36d55b6034cf4231a0d9015512e63306
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spelling	oai:doaj.org-article:36d55b6034cf4231a0d9015512e633062021-11-10T04:41:42ZReduced-order modelling of urban wind environment and gaseous pollutants dispersion in an urban-scale street canyon2666-449610.1016/j.jnlssr.2021.09.001https://doaj.org/article/36d55b6034cf4231a0d9015512e633062021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666449621000372https://doaj.org/toc/2666-4496Hazardous chemical gases will spread rapidly after leakage. For emergency response to that, people need to obtain the information of wind and pollutant in time. However, it takes a lot of time to calculate the flow in large-scale urban areas by numerical simulation. Therefore, reduced-order model(ROM) is developed to improve the efficiency. In this paper, we propose a model based on proper orthogonal decomposition(POD) and radial basis function(RBF) interpolation. We validate the model by calculating the wind field and the pollutant propagation process in a 144 square kilometer area of Beijing. The results show that ROM can reduce CPU times by more than 99% at the cost of only 0.1% information loss, comparing with the traditional approach of computational fluid dynamics(CFD).Shan DingRui YangKeAi Communications Co., Ltd.articleFinite volume methodReduced-order modellingProper orthogonal decompositionInterpolationRadial basis functionsRisk in industry. Risk managementHD61ENJournal of Safety Science and Resilience, Vol 2, Iss 4, Pp 238-245 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Finite volume method Reduced-order modelling Proper orthogonal decomposition Interpolation Radial basis functions Risk in industry. Risk management HD61
spellingShingle	Finite volume method Reduced-order modelling Proper orthogonal decomposition Interpolation Radial basis functions Risk in industry. Risk management HD61 Shan Ding Rui Yang Reduced-order modelling of urban wind environment and gaseous pollutants dispersion in an urban-scale street canyon
description	Hazardous chemical gases will spread rapidly after leakage. For emergency response to that, people need to obtain the information of wind and pollutant in time. However, it takes a lot of time to calculate the flow in large-scale urban areas by numerical simulation. Therefore, reduced-order model(ROM) is developed to improve the efficiency. In this paper, we propose a model based on proper orthogonal decomposition(POD) and radial basis function(RBF) interpolation. We validate the model by calculating the wind field and the pollutant propagation process in a 144 square kilometer area of Beijing. The results show that ROM can reduce CPU times by more than 99% at the cost of only 0.1% information loss, comparing with the traditional approach of computational fluid dynamics(CFD).
format	article
author	Shan Ding Rui Yang
author_facet	Shan Ding Rui Yang
author_sort	Shan Ding
title	Reduced-order modelling of urban wind environment and gaseous pollutants dispersion in an urban-scale street canyon
title_short	Reduced-order modelling of urban wind environment and gaseous pollutants dispersion in an urban-scale street canyon
title_full	Reduced-order modelling of urban wind environment and gaseous pollutants dispersion in an urban-scale street canyon
title_fullStr	Reduced-order modelling of urban wind environment and gaseous pollutants dispersion in an urban-scale street canyon
title_full_unstemmed	Reduced-order modelling of urban wind environment and gaseous pollutants dispersion in an urban-scale street canyon
title_sort	reduced-order modelling of urban wind environment and gaseous pollutants dispersion in an urban-scale street canyon
publisher	KeAi Communications Co., Ltd.
publishDate	2021
url	https://doaj.org/article/36d55b6034cf4231a0d9015512e63306
work_keys_str_mv	AT shanding reducedordermodellingofurbanwindenvironmentandgaseouspollutantsdispersioninanurbanscalestreetcanyon AT ruiyang reducedordermodellingofurbanwindenvironmentandgaseouspollutantsdispersioninanurbanscalestreetcanyon
_version_	1718440542789959680

Reduced-order modelling of urban wind environment and gaseous pollutants dispersion in an urban-scale street canyon

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