Effect of Canyons on a Fire Propagating Laterally Over Slopes
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/101604 https://doi.org/10.3389/fmech.2019.00041 |
Resumo: | In this paper, the problem related with a fire front propagating laterally on a slope with a nearby canyon is presented. The presence of the canyon can modify the intensity of the fire and create a difficult situation for elements involved in fire suppression. When a fire propagating laterally in a slope enters the canyon, a rapid increase in the fire’s rate of spread occurs and a strong convective activity is generated due to the burning inside the canyon. The convective flow generated will then induce a change in the propagation of the fire in the slope. In certain conditions the rate of spread and the intensity of the fire will be strongly increased. This type of extreme fire behavior is referred to as eruptive fire behavior (or blow-up), and usually happens over slopes or in canyon configurations. In this study, we analyzed the results of laboratory-scale experiments that model a fire spreading latterly over a slope and then enter a canyon that is embedded in the slope. Three configuration parameters were used in the experiments. The first is the inclination of the slope, the second is the orientation of the axis of the canyon and the third is the angle of the ignition line. The fire spread is very complex and dynamic resulting in situations in which very high values of the ROS can be reached for several configurations, creating dangerous situations for firefighters. |
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Effect of Canyons on a Fire Propagating Laterally Over Slopesforest firesfire safetyextreme fire behavioreruptive behaviorfire in canyonsIn this paper, the problem related with a fire front propagating laterally on a slope with a nearby canyon is presented. The presence of the canyon can modify the intensity of the fire and create a difficult situation for elements involved in fire suppression. When a fire propagating laterally in a slope enters the canyon, a rapid increase in the fire’s rate of spread occurs and a strong convective activity is generated due to the burning inside the canyon. The convective flow generated will then induce a change in the propagation of the fire in the slope. In certain conditions the rate of spread and the intensity of the fire will be strongly increased. This type of extreme fire behavior is referred to as eruptive fire behavior (or blow-up), and usually happens over slopes or in canyon configurations. In this study, we analyzed the results of laboratory-scale experiments that model a fire spreading latterly over a slope and then enter a canyon that is embedded in the slope. Three configuration parameters were used in the experiments. The first is the inclination of the slope, the second is the orientation of the axis of the canyon and the third is the angle of the ignition line. The fire spread is very complex and dynamic resulting in situations in which very high values of the ROS can be reached for several configurations, creating dangerous situations for firefighters.2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/101604http://hdl.handle.net/10316/101604https://doi.org/10.3389/fmech.2019.00041eng2297-3079Rodrigues, AndréRibeiro, CarlosRaposo, JorgeViegas, Domingos XavierAndré, Jorgeinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-02T20:48:20Zoai:estudogeral.uc.pt:10316/101604Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:18:45.690661Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Effect of Canyons on a Fire Propagating Laterally Over Slopes |
title |
Effect of Canyons on a Fire Propagating Laterally Over Slopes |
spellingShingle |
Effect of Canyons on a Fire Propagating Laterally Over Slopes Rodrigues, André forest fires fire safety extreme fire behavior eruptive behavior fire in canyons |
title_short |
Effect of Canyons on a Fire Propagating Laterally Over Slopes |
title_full |
Effect of Canyons on a Fire Propagating Laterally Over Slopes |
title_fullStr |
Effect of Canyons on a Fire Propagating Laterally Over Slopes |
title_full_unstemmed |
Effect of Canyons on a Fire Propagating Laterally Over Slopes |
title_sort |
Effect of Canyons on a Fire Propagating Laterally Over Slopes |
author |
Rodrigues, André |
author_facet |
Rodrigues, André Ribeiro, Carlos Raposo, Jorge Viegas, Domingos Xavier André, Jorge |
author_role |
author |
author2 |
Ribeiro, Carlos Raposo, Jorge Viegas, Domingos Xavier André, Jorge |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Rodrigues, André Ribeiro, Carlos Raposo, Jorge Viegas, Domingos Xavier André, Jorge |
dc.subject.por.fl_str_mv |
forest fires fire safety extreme fire behavior eruptive behavior fire in canyons |
topic |
forest fires fire safety extreme fire behavior eruptive behavior fire in canyons |
description |
In this paper, the problem related with a fire front propagating laterally on a slope with a nearby canyon is presented. The presence of the canyon can modify the intensity of the fire and create a difficult situation for elements involved in fire suppression. When a fire propagating laterally in a slope enters the canyon, a rapid increase in the fire’s rate of spread occurs and a strong convective activity is generated due to the burning inside the canyon. The convective flow generated will then induce a change in the propagation of the fire in the slope. In certain conditions the rate of spread and the intensity of the fire will be strongly increased. This type of extreme fire behavior is referred to as eruptive fire behavior (or blow-up), and usually happens over slopes or in canyon configurations. In this study, we analyzed the results of laboratory-scale experiments that model a fire spreading latterly over a slope and then enter a canyon that is embedded in the slope. Three configuration parameters were used in the experiments. The first is the inclination of the slope, the second is the orientation of the axis of the canyon and the third is the angle of the ignition line. The fire spread is very complex and dynamic resulting in situations in which very high values of the ROS can be reached for several configurations, creating dangerous situations for firefighters. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/101604 http://hdl.handle.net/10316/101604 https://doi.org/10.3389/fmech.2019.00041 |
url |
http://hdl.handle.net/10316/101604 https://doi.org/10.3389/fmech.2019.00041 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2297-3079 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799134082246901760 |