Effects of anisotropy on the stability of Giesekus fluid flow

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorNational Institute for Space Research-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorFurlan, L. J.S.-
Autor(es): dc.creatorAraujo, M. T.-
Autor(es): dc.creatorMendonca, M. T.-
Autor(es): dc.creatorBrandi, A. C.-
Autor(es): dc.creatorSouza, L. F.-
Data de aceite: dc.date.accessioned2025-08-21T22:01:36Z-
Data de disponibilização: dc.date.available2025-08-21T22:01:36Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2022-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1063/5.0125989-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/248076-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/248076-
Descrição: dc.descriptionIn the present work, the stability of a viscoelastic fluid flow is studied by linear stability theory, and some results are verified by direct numerical simulation. The investigation considers the fluid flow between two parallel plates, modeled by the Giesekus constitutive equation. The results show the influence of the anisotropic tensorial correction parameter αG on this model, showing a stabilizing influence for two-dimensional disturbances for small values of αG. However, as αG increases, a reduction in the critical Reynolds number values is observed, possibly hastening the transition to turbulence. Low values for αG for three-dimensional disturbances cause more significant variations for the critical Reynolds number. This variation decreases as the value of this parameter increases. The results also show that low values of αG increase the instability of three-dimensional disturbances and confirm that Squire's theorem is not valid for this model. As for the two-dimensional disturbances, the anisotropic term on the Giesekus model lowers the critical Reynolds number for higher quantities of polymer viscosity in the mixture and high values for the Weissenberg number.-
Descrição: dc.descriptionDepartment of Applied Mathematics and Statistics University of Sao Paulo Sao Carlos-
Descrição: dc.descriptionCombustion and Propulsion Laboratory National Institute for Space Research, Cachoeira Paulista-
Descrição: dc.descriptionDepartment of Mathematics and Computer Science Sao Paulo State University, Presidente Prudente-
Descrição: dc.descriptionDepartment of Mathematics and Computer Science Sao Paulo State University, Presidente Prudente-
Idioma: dc.languageen-
Relação: dc.relationPhysics of Fluids-
???dc.source???: dc.sourceScopus-
Título: dc.titleEffects of anisotropy on the stability of Giesekus fluid flow-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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