A simplified mathematical model to estimate the erosive capacity of a pulsating laminar muddy flow
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1413-41522018175446 http://hdl.handle.net/11449/186507 |
Resumo: | In this paper, we proposed and validated a simplified mathematical model to estimate the erosive capacity of a muddy laminar flow with roll waves (pulsating effect) on the free surface. From the perspective of applying results in the context of natural disasters (mudflows), the evolution of mean velocity and bottom shear stress in the channel were determined. The proposed model is based on shallow water equations and Herschel-Bulkley rheology as representative of the muds. The model was validated by comparison with results of numerical simulations and experimental data of roll waves generated in a channel. In-depth comparative analyses were made for inferring the erosive capacity of this sort of flow. The obtained results show an increase of erosive capacity (12%) due to the presence of roll waves in relation to the uniform flow's. Similar values (10%) were found by Ng and Mei (1994) for a more simplified rheology model. |
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Repositório Institucional da UNESP |
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2946 |
spelling |
A simplified mathematical model to estimate the erosive capacity of a pulsating laminar muddy flowmudflowsnon-Newtonian fluidroll wavesbottom shear stressIn this paper, we proposed and validated a simplified mathematical model to estimate the erosive capacity of a muddy laminar flow with roll waves (pulsating effect) on the free surface. From the perspective of applying results in the context of natural disasters (mudflows), the evolution of mean velocity and bottom shear stress in the channel were determined. The proposed model is based on shallow water equations and Herschel-Bulkley rheology as representative of the muds. The model was validated by comparison with results of numerical simulations and experimental data of roll waves generated in a channel. In-depth comparative analyses were made for inferring the erosive capacity of this sort of flow. The obtained results show an increase of erosive capacity (12%) due to the presence of roll waves in relation to the uniform flow's. Similar values (10%) were found by Ng and Mei (1994) for a more simplified rheology model.Univ Estadual Paulista, Ilha Solteira, SP, BrazilUniv Fed Sao Paulo, Diadema, SP, BrazilUniv Estadual Paulista, Ilha Solteira, SP, BrazilAssoc Brasileira Engenharia Sanitaria AmbientalUniversidade Estadual Paulista (Unesp)Universidade Federal de São Paulo (UNIFESP)Maciel, Geraldo de Freitas [UNESP]Toniati, Andre Luis [UNESP]Ferreira, Fabiana de Oliveira2019-10-05T04:09:44Z2019-10-05T04:09:44Z2018-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article913-922application/pdfhttp://dx.doi.org/10.1590/S1413-41522018175446Engenharia Sanitaria E Ambiental. Rio De Janeiro: Assoc Brasileira Engenharia Sanitaria Ambiental, v. 23, n. 5, p. 913-922, 2018.1413-4152http://hdl.handle.net/11449/18650710.1590/S1413-41522018175446S1413-41522018000500913WOS:000451639900009S1413-41522018000500913.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporEngenharia Sanitaria E Ambientalinfo:eu-repo/semantics/openAccess2024-07-04T18:16:01Zoai:repositorio.unesp.br:11449/186507Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:51:59.923144Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
A simplified mathematical model to estimate the erosive capacity of a pulsating laminar muddy flow |
title |
A simplified mathematical model to estimate the erosive capacity of a pulsating laminar muddy flow |
spellingShingle |
A simplified mathematical model to estimate the erosive capacity of a pulsating laminar muddy flow Maciel, Geraldo de Freitas [UNESP] mudflows non-Newtonian fluid roll waves bottom shear stress |
title_short |
A simplified mathematical model to estimate the erosive capacity of a pulsating laminar muddy flow |
title_full |
A simplified mathematical model to estimate the erosive capacity of a pulsating laminar muddy flow |
title_fullStr |
A simplified mathematical model to estimate the erosive capacity of a pulsating laminar muddy flow |
title_full_unstemmed |
A simplified mathematical model to estimate the erosive capacity of a pulsating laminar muddy flow |
title_sort |
A simplified mathematical model to estimate the erosive capacity of a pulsating laminar muddy flow |
author |
Maciel, Geraldo de Freitas [UNESP] |
author_facet |
Maciel, Geraldo de Freitas [UNESP] Toniati, Andre Luis [UNESP] Ferreira, Fabiana de Oliveira |
author_role |
author |
author2 |
Toniati, Andre Luis [UNESP] Ferreira, Fabiana de Oliveira |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de São Paulo (UNIFESP) |
dc.contributor.author.fl_str_mv |
Maciel, Geraldo de Freitas [UNESP] Toniati, Andre Luis [UNESP] Ferreira, Fabiana de Oliveira |
dc.subject.por.fl_str_mv |
mudflows non-Newtonian fluid roll waves bottom shear stress |
topic |
mudflows non-Newtonian fluid roll waves bottom shear stress |
description |
In this paper, we proposed and validated a simplified mathematical model to estimate the erosive capacity of a muddy laminar flow with roll waves (pulsating effect) on the free surface. From the perspective of applying results in the context of natural disasters (mudflows), the evolution of mean velocity and bottom shear stress in the channel were determined. The proposed model is based on shallow water equations and Herschel-Bulkley rheology as representative of the muds. The model was validated by comparison with results of numerical simulations and experimental data of roll waves generated in a channel. In-depth comparative analyses were made for inferring the erosive capacity of this sort of flow. The obtained results show an increase of erosive capacity (12%) due to the presence of roll waves in relation to the uniform flow's. Similar values (10%) were found by Ng and Mei (1994) for a more simplified rheology model. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-09-01 2019-10-05T04:09:44Z 2019-10-05T04:09:44Z |
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://dx.doi.org/10.1590/S1413-41522018175446 Engenharia Sanitaria E Ambiental. Rio De Janeiro: Assoc Brasileira Engenharia Sanitaria Ambiental, v. 23, n. 5, p. 913-922, 2018. 1413-4152 http://hdl.handle.net/11449/186507 10.1590/S1413-41522018175446 S1413-41522018000500913 WOS:000451639900009 S1413-41522018000500913.pdf |
url |
http://dx.doi.org/10.1590/S1413-41522018175446 http://hdl.handle.net/11449/186507 |
identifier_str_mv |
Engenharia Sanitaria E Ambiental. Rio De Janeiro: Assoc Brasileira Engenharia Sanitaria Ambiental, v. 23, n. 5, p. 913-922, 2018. 1413-4152 10.1590/S1413-41522018175446 S1413-41522018000500913 WOS:000451639900009 S1413-41522018000500913.pdf |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Engenharia Sanitaria E Ambiental |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
913-922 application/pdf |
dc.publisher.none.fl_str_mv |
Assoc Brasileira Engenharia Sanitaria Ambiental |
publisher.none.fl_str_mv |
Assoc Brasileira Engenharia Sanitaria Ambiental |
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_ |
1808129130520117248 |