Numerical approximation to the effects of the atmospheric stability conditions on the dispersion of pollutants over flat areas

Abstract Using the Computational Fluid Dynamics technique (CFD), we explored the effects of the atmospheric stability conditions on the dispersion of solid and gas-phase pollutants emitted from an area source located on a flat region. As an application, the dispersion of pollutants emitted from road...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	J. I. Huertas, D. S. Martinez, D. F. Prato
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/59f2c6e2ef174a308ddbfd4bf11f36b5
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:59f2c6e2ef174a308ddbfd4bf11f36b5
record_format	dspace
spelling	oai:doaj.org-article:59f2c6e2ef174a308ddbfd4bf11f36b52021-12-02T17:50:57ZNumerical approximation to the effects of the atmospheric stability conditions on the dispersion of pollutants over flat areas10.1038/s41598-021-89200-92045-2322https://doaj.org/article/59f2c6e2ef174a308ddbfd4bf11f36b52021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89200-9https://doaj.org/toc/2045-2322Abstract Using the Computational Fluid Dynamics technique (CFD), we explored the effects of the atmospheric stability conditions on the dispersion of solid and gas-phase pollutants emitted from an area source located on a flat region. As an application, the dispersion of pollutants emitted from roads located on flat terrains was considered. Toward that end, we set up a model that describes the dispersion of air pollutants in a small region (< 1 km long) near the ground surface (< 250 m high). It consists of a neutrally stratified model modified to account for the atmospheric stability effects by imposing the near-ground stratification through the Monin–Obukhov similarity theory and the k–ε turbulence model adjusted for each atmospheric stability condition. Using this model, we simulated the dispersion of pollutants emitted from the road and plotted the resulting downwind concentrations in terms of dimensionless numbers. Results from our CFD-based model were highly correlated (R 2 > 0.95) with the SF6 concentrations measured downwind a line source of this trace gas by the U.S. National Oceanic Atmospheric Administration in 2008 under different conditions of atmospheric stability. Numerical and experimental results showed that, under any of the stability conditions explored, the near-road pollutant concentrations are highly correlated (R 2 > 0.87) to the concentrations observed under neutral conditions. When the atmosphere is extremely stable, those concentrations were up to 12 times higher than those observed under neutral conditions. We report the constant of proportionality obtained for every stability condition.J. I. HuertasD. S. MartinezD. F. PratoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q J. I. Huertas D. S. Martinez D. F. Prato Numerical approximation to the effects of the atmospheric stability conditions on the dispersion of pollutants over flat areas
description	Abstract Using the Computational Fluid Dynamics technique (CFD), we explored the effects of the atmospheric stability conditions on the dispersion of solid and gas-phase pollutants emitted from an area source located on a flat region. As an application, the dispersion of pollutants emitted from roads located on flat terrains was considered. Toward that end, we set up a model that describes the dispersion of air pollutants in a small region (< 1 km long) near the ground surface (< 250 m high). It consists of a neutrally stratified model modified to account for the atmospheric stability effects by imposing the near-ground stratification through the Monin–Obukhov similarity theory and the k–ε turbulence model adjusted for each atmospheric stability condition. Using this model, we simulated the dispersion of pollutants emitted from the road and plotted the resulting downwind concentrations in terms of dimensionless numbers. Results from our CFD-based model were highly correlated (R 2 > 0.95) with the SF6 concentrations measured downwind a line source of this trace gas by the U.S. National Oceanic Atmospheric Administration in 2008 under different conditions of atmospheric stability. Numerical and experimental results showed that, under any of the stability conditions explored, the near-road pollutant concentrations are highly correlated (R 2 > 0.87) to the concentrations observed under neutral conditions. When the atmosphere is extremely stable, those concentrations were up to 12 times higher than those observed under neutral conditions. We report the constant of proportionality obtained for every stability condition.
format	article
author	J. I. Huertas D. S. Martinez D. F. Prato
author_facet	J. I. Huertas D. S. Martinez D. F. Prato
author_sort	J. I. Huertas
title	Numerical approximation to the effects of the atmospheric stability conditions on the dispersion of pollutants over flat areas
title_short	Numerical approximation to the effects of the atmospheric stability conditions on the dispersion of pollutants over flat areas
title_full	Numerical approximation to the effects of the atmospheric stability conditions on the dispersion of pollutants over flat areas
title_fullStr	Numerical approximation to the effects of the atmospheric stability conditions on the dispersion of pollutants over flat areas
title_full_unstemmed	Numerical approximation to the effects of the atmospheric stability conditions on the dispersion of pollutants over flat areas
title_sort	numerical approximation to the effects of the atmospheric stability conditions on the dispersion of pollutants over flat areas
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/59f2c6e2ef174a308ddbfd4bf11f36b5
work_keys_str_mv	AT jihuertas numericalapproximationtotheeffectsoftheatmosphericstabilityconditionsonthedispersionofpollutantsoverflatareas AT dsmartinez numericalapproximationtotheeffectsoftheatmosphericstabilityconditionsonthedispersionofpollutantsoverflatareas AT dfprato numericalapproximationtotheeffectsoftheatmosphericstabilityconditionsonthedispersionofpollutantsoverflatareas
_version_	1718379286627352576

Numerical approximation to the effects of the atmospheric stability conditions on the dispersion of pollutants over flat areas

Ejemplares similares