Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/53298
Título: | A numerical and theoretical study on viscoelastic fluid slip flows |
Autor(es): | Ferrás, Luís Jorge Lima Afonso, A. M. Nóbrega, J. M. Pinho, F. T. |
Data: | 2017 |
Editora: | American Institute of Physics |
Revista: | Physics of Fluids |
Resumo(s): | This work describes a theoretical and numerical investigation of viscoelastic fluid flows, considering slip boundary conditions. The viscoelastic fluid is described by the simplified Phan-Thien-Tanner model, and the governing equations with slip boundary conditions are solved by a finite volume method using (1) a recently proposed methodology to control the growth of the slip velocity along the iterative process (named the SIMPLE-slip method) where some simplifications are assumed at the wall, and also (2) a slip formulation where the complete stress tensor at the wall is taken into account. Analytical and semi-analytical solutions are also provided for the fully developed flow between parallel plates of viscoelastic fluids, assuming Thomson and Troian and Lau and Schowalter non-linear wall slip models. For verification purposes, the numerical results were compared with the analytical solution for fully developed slip-flow in a planar channel using two non-linear slip models. Simulations were carried out in a classical benchmark problem in computational rheology, the viscoelastic fluid flow in a slip-stick geometry, aiming to identify the influence of slip intensity on the flow patterns, velocity, and stress growth at the singularity region. Published by AIP Publishing. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/53298 |
DOI: | 10.1063/1.4983062 |
ISSN: | 1070-6631 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito autor |
Aparece nas coleções: | IPC - Artigos em revistas científicas internacionais com arbitragem |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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slip_stick_TCFD.pdf Acesso restrito! | 5,44 MB | Adobe PDF | Ver/Abrir |