The effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.4995/ISUF2017.2017.4832 http://hdl.handle.net/11449/185941 |
Resumo: | This paper seeks to identify a pattern of air turbulence that reflects the effect of buildings on air turbulence characteristics measured in open spaces in Western Sao Paulo State, Brazil. Atmospheric turbulence was estimated using high frequency observations of the three orthogonal wind components (u, v, w). A CSAT3 sonic anemometer from Campbell Scientific Inc. (CSI) was deployed on the roof of a building, and the turbulent components (u', v', w') were systematically measured and recorded at 0.1 s and 5 min intervals, respectively, over 100 days between the end of summer (March 2015) and beginning of winter (July 2015) with a CR3000 automatic data acquisition system (CSI). The data analysis took into account the diurnal and nocturnal variability of the turbulence, and the experimental results revealed the existence of a daily vertical circulation pattern. The w component varied between 15 and 45 cm.s-1 on average, and the turbulent fluctuations observed indicated that an ascending component with a speed of up to 1 m.s-1 predominated during the middle of the day and early afternoon. Throughout the night until the early hours of the morning, a less robust, subsiding component with a speed of up to 0.5 m.s-1 was observed. The mean horizontal flow (u, v) was low-speed (around 1 m.s-1) and predominantly from the southeast. There was a consistent change in the direction of this wind, which changed to easterly during the morning as the ascending branch developed. We propose a model for air circulation close to the surface in which this change in direction of the wind is the main effect of the building on the observed turbulence. |
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The effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, BrazilBuilt environmentsonic anemometeratmospheric turbulenceopen spacesThis paper seeks to identify a pattern of air turbulence that reflects the effect of buildings on air turbulence characteristics measured in open spaces in Western Sao Paulo State, Brazil. Atmospheric turbulence was estimated using high frequency observations of the three orthogonal wind components (u, v, w). A CSAT3 sonic anemometer from Campbell Scientific Inc. (CSI) was deployed on the roof of a building, and the turbulent components (u', v', w') were systematically measured and recorded at 0.1 s and 5 min intervals, respectively, over 100 days between the end of summer (March 2015) and beginning of winter (July 2015) with a CR3000 automatic data acquisition system (CSI). The data analysis took into account the diurnal and nocturnal variability of the turbulence, and the experimental results revealed the existence of a daily vertical circulation pattern. The w component varied between 15 and 45 cm.s-1 on average, and the turbulent fluctuations observed indicated that an ascending component with a speed of up to 1 m.s-1 predominated during the middle of the day and early afternoon. Throughout the night until the early hours of the morning, a less robust, subsiding component with a speed of up to 0.5 m.s-1 was observed. The mean horizontal flow (u, v) was low-speed (around 1 m.s-1) and predominantly from the southeast. There was a consistent change in the direction of this wind, which changed to easterly during the morning as the ascending branch developed. We propose a model for air circulation close to the surface in which this change in direction of the wind is the main effect of the building on the observed turbulence.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Sao Paulo State Univ UNESP, Dept Geog, Fac Sci & Technol, Presidente Prudente, SP, BrazilSao Paulo State Univ UNESP, Dept Geog, Fac Sci & Technol, Presidente Prudente, SP, BrazilFAPESP: 2011/08520-8Univ Politecnica ValenciaUniversidade Estadual Paulista (Unesp)Machado, Antonio Jaschke [UNESP]Colomer, V2019-10-04T12:39:57Z2019-10-04T12:39:57Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject1211-1221http://dx.doi.org/10.4995/ISUF2017.2017.483224th Isuf International Conference: City And Territory In The Globalization Age. Valencia: Univ Politecnica Valencia, p. 1211-1221, 2018.http://hdl.handle.net/11449/18594110.4995/ISUF2017.2017.4832WOS:000476920100118Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPeng24th Isuf International Conference: City And Territory In The Globalization Ageinfo:eu-repo/semantics/openAccess2024-06-19T13:48:33Zoai:repositorio.unesp.br:11449/185941Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:05:14.701352Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
The effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, Brazil |
title |
The effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, Brazil |
spellingShingle |
The effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, Brazil Machado, Antonio Jaschke [UNESP] Built environment sonic anemometer atmospheric turbulence open spaces |
title_short |
The effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, Brazil |
title_full |
The effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, Brazil |
title_fullStr |
The effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, Brazil |
title_full_unstemmed |
The effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, Brazil |
title_sort |
The effect of buildings on atmospheric turbulence in open spaces in Western Sao Paulo State, Brazil |
author |
Machado, Antonio Jaschke [UNESP] |
author_facet |
Machado, Antonio Jaschke [UNESP] Colomer, V |
author_role |
author |
author2 |
Colomer, V |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Machado, Antonio Jaschke [UNESP] Colomer, V |
dc.subject.por.fl_str_mv |
Built environment sonic anemometer atmospheric turbulence open spaces |
topic |
Built environment sonic anemometer atmospheric turbulence open spaces |
description |
This paper seeks to identify a pattern of air turbulence that reflects the effect of buildings on air turbulence characteristics measured in open spaces in Western Sao Paulo State, Brazil. Atmospheric turbulence was estimated using high frequency observations of the three orthogonal wind components (u, v, w). A CSAT3 sonic anemometer from Campbell Scientific Inc. (CSI) was deployed on the roof of a building, and the turbulent components (u', v', w') were systematically measured and recorded at 0.1 s and 5 min intervals, respectively, over 100 days between the end of summer (March 2015) and beginning of winter (July 2015) with a CR3000 automatic data acquisition system (CSI). The data analysis took into account the diurnal and nocturnal variability of the turbulence, and the experimental results revealed the existence of a daily vertical circulation pattern. The w component varied between 15 and 45 cm.s-1 on average, and the turbulent fluctuations observed indicated that an ascending component with a speed of up to 1 m.s-1 predominated during the middle of the day and early afternoon. Throughout the night until the early hours of the morning, a less robust, subsiding component with a speed of up to 0.5 m.s-1 was observed. The mean horizontal flow (u, v) was low-speed (around 1 m.s-1) and predominantly from the southeast. There was a consistent change in the direction of this wind, which changed to easterly during the morning as the ascending branch developed. We propose a model for air circulation close to the surface in which this change in direction of the wind is the main effect of the building on the observed turbulence. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01 2019-10-04T12:39:57Z 2019-10-04T12:39:57Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.4995/ISUF2017.2017.4832 24th Isuf International Conference: City And Territory In The Globalization Age. Valencia: Univ Politecnica Valencia, p. 1211-1221, 2018. http://hdl.handle.net/11449/185941 10.4995/ISUF2017.2017.4832 WOS:000476920100118 |
url |
http://dx.doi.org/10.4995/ISUF2017.2017.4832 http://hdl.handle.net/11449/185941 |
identifier_str_mv |
24th Isuf International Conference: City And Territory In The Globalization Age. Valencia: Univ Politecnica Valencia, p. 1211-1221, 2018. 10.4995/ISUF2017.2017.4832 WOS:000476920100118 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
24th Isuf International Conference: City And Territory In The Globalization Age |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1211-1221 |
dc.publisher.none.fl_str_mv |
Univ Politecnica Valencia |
publisher.none.fl_str_mv |
Univ Politecnica Valencia |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129017782468608 |