Investigation of the stability of a planar Oldroyd-B jet

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorAerospacial Sciences and Technology Department-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorde L. Sterza, Rafael-
Autor(es): dc.creatorde Mendonca, Marcio T.-
Autor(es): dc.creatorde Souza, Leandro F.-
Autor(es): dc.creatorBrandi, Analice C.-
Data de aceite: dc.date.accessioned2025-08-21T16:29:59Z-
Data de disponibilização: dc.date.available2025-08-21T16:29:59Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-05-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s40430-023-04162-5-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/247190-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/247190-
Descrição: dc.descriptionThe stability characteristics of incompressible, viscoelastic planar jets are investigated in the present work. The Oldroyd-B constitutive equation represents the viscoelastic fluid behavior. Linear stability theory is used to study the sinuous and varicose stability modes’ growth rates, wave velocity, and neutral curves as a function of the Weissenberg number, Reynolds number, and solvent viscosity coefficient. A canonical velocity profile gives the laminar jet base flow. The polymer stress tensor components are computed considering a parallel flow approximation, verified by comparing profiles with stress tensor profiles obtained by computational fluid dynamic simulations. The modified Orr–Sommerfeld equation with included viscoelastic effects is solved by a shooting method. The results show that viscoelastic effects become significant for low Reynolds numbers, stabilizing the sinuous mode and destabilizing the varicose mode compared to the Newtonian jet stability results. Neutral curves are also presented, showing the viscoelastic effects on the critical Reynolds number and the possible existence of elastic instability in the limit of low Reynolds numbers.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionDepartment of Applied Mathematics and Statistics University of Sao Paulo, Avenida Trabalhador São-carlense, 400, SP-
Descrição: dc.descriptionAeronautics and Space Institute Aerospacial Sciences and Technology Department, Praça Mal Eduardo Gomes, 50, SP-
Descrição: dc.descriptionDepartment of Mathematics and Computer Science Sao Paulo State University, Rua Roberto Simonsen, 305, SP-
Descrição: dc.descriptionDepartment of Mathematics and Computer Science Sao Paulo State University, Rua Roberto Simonsen, 305, SP-
Idioma: dc.languageen-
Relação: dc.relationJournal of the Brazilian Society of Mechanical Sciences and Engineering-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectJet flow-
Palavras-chave: dc.subjectLinear stability theory-
Palavras-chave: dc.subjectOldroyd-B fluid-
Palavras-chave: dc.subjectOrr–Sommerfeld equation-
Título: dc.titleInvestigation of the stability of a planar Oldroyd-B jet-
Tipo de arquivo: dc.typelivro digital-
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