A numerical and theoretical study on viscoelastic fluid slip flows

• Tipo: Artigo em Revista Científica Internacional
• Data: 2017

Autores

L. L. Ferrás (Autor) Outra; A. M. Afonso (Autor) FEUP; J. M. Nóbrega (Autor) Outra; F. T. Pinho (Autor) FEUP

Revista

Título: Physics of Fluids

Vol. 29 Nº 5

Página Final: 053102

ISSN: 1070-6631

Editora: American Institute of Physics

Indexação

ISI Web of Knowledge - 7 Citações

Scopus - 14 Citações

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias

Projetos Associados

MOLDPRO - Aproximações multi-escala para moldação por injeção de materiais plásticos

Outras Informações

ID Authenticus: P-00M-WPV

DOI: 10.1063/1.4983062

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16