Roll waves evolution in high gradient channels to a non-Newtonian rheology

Detalhes bibliográficos
Autor(a) principal: Maciel, G. F. [UNESP]
Data de Publicação: 2002
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.4203/ccp.76.37
http://hdl.handle.net/11449/67099
Resumo: The criteria for the occurrence of roll wave phenomenon in the supercritical and turbulent Newtonian and non-Newtonian flows from the engineering point of view was analyzed. Imposing a constant discharge at the upstream of the canal and superposing a small perturbation, it was observed that roll waves can be developed more easily for small wave numbers and for high cohesions. Moreover, from the mathematical model used, it was demonstrated that the numerical viscosity was 10 times the physical viscosity.
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spelling Roll waves evolution in high gradient channels to a non-Newtonian rheologyBingham fluidRoll waveShallow waterComputer simulationMathematical modelsPerturbation techniquesReynolds numberViscosityWavesGodunov-VanLeer schemesRoll wavesRheologyThe criteria for the occurrence of roll wave phenomenon in the supercritical and turbulent Newtonian and non-Newtonian flows from the engineering point of view was analyzed. Imposing a constant discharge at the upstream of the canal and superposing a small perturbation, it was observed that roll waves can be developed more easily for small wave numbers and for high cohesions. Moreover, from the mathematical model used, it was demonstrated that the numerical viscosity was 10 times the physical viscosity.Department of Civil Engineering São Paulo State University, Ilha SolteiraDepartment of Civil Engineering São Paulo State University, Ilha SolteiraUniversidade Estadual Paulista (Unesp)Maciel, G. F. [UNESP]2014-05-27T11:20:34Z2014-05-27T11:20:34Z2002-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject97-98http://dx.doi.org/10.4203/ccp.76.37Proceedings of the Third International Conference on Engineering Computational Technology, p. 97-98.http://hdl.handle.net/11449/6709910.4203/ccp.76.372-s2.0-00369271765808118510418914Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengProceedings of the Third International Conference on Engineering Computational Technologyinfo:eu-repo/semantics/openAccess2021-10-23T21:41:29Zoai:repositorio.unesp.br:11449/67099Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T21:41:29Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Roll waves evolution in high gradient channels to a non-Newtonian rheology
title Roll waves evolution in high gradient channels to a non-Newtonian rheology
spellingShingle Roll waves evolution in high gradient channels to a non-Newtonian rheology
Maciel, G. F. [UNESP]
Bingham fluid
Roll wave
Shallow water
Computer simulation
Mathematical models
Perturbation techniques
Reynolds number
Viscosity
Waves
Godunov-VanLeer schemes
Roll waves
Rheology
title_short Roll waves evolution in high gradient channels to a non-Newtonian rheology
title_full Roll waves evolution in high gradient channels to a non-Newtonian rheology
title_fullStr Roll waves evolution in high gradient channels to a non-Newtonian rheology
title_full_unstemmed Roll waves evolution in high gradient channels to a non-Newtonian rheology
title_sort Roll waves evolution in high gradient channels to a non-Newtonian rheology
author Maciel, G. F. [UNESP]
author_facet Maciel, G. F. [UNESP]
author_role author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Maciel, G. F. [UNESP]
dc.subject.por.fl_str_mv Bingham fluid
Roll wave
Shallow water
Computer simulation
Mathematical models
Perturbation techniques
Reynolds number
Viscosity
Waves
Godunov-VanLeer schemes
Roll waves
Rheology
topic Bingham fluid
Roll wave
Shallow water
Computer simulation
Mathematical models
Perturbation techniques
Reynolds number
Viscosity
Waves
Godunov-VanLeer schemes
Roll waves
Rheology
description The criteria for the occurrence of roll wave phenomenon in the supercritical and turbulent Newtonian and non-Newtonian flows from the engineering point of view was analyzed. Imposing a constant discharge at the upstream of the canal and superposing a small perturbation, it was observed that roll waves can be developed more easily for small wave numbers and for high cohesions. Moreover, from the mathematical model used, it was demonstrated that the numerical viscosity was 10 times the physical viscosity.
publishDate 2002
dc.date.none.fl_str_mv 2002-12-01
2014-05-27T11:20:34Z
2014-05-27T11:20:34Z
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/10.4203/ccp.76.37
Proceedings of the Third International Conference on Engineering Computational Technology, p. 97-98.
http://hdl.handle.net/11449/67099
10.4203/ccp.76.37
2-s2.0-0036927176
5808118510418914
url http://dx.doi.org/10.4203/ccp.76.37
http://hdl.handle.net/11449/67099
identifier_str_mv Proceedings of the Third International Conference on Engineering Computational Technology, p. 97-98.
10.4203/ccp.76.37
2-s2.0-0036927176
5808118510418914
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Proceedings of the Third International Conference on Engineering Computational Technology
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 97-98
dc.source.none.fl_str_mv Scopus
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_ 1803047371719835648

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