Viscoelastic secondary flows in serpentine channels

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

R. J. Poole (Autor) Outra; A. Lindner (Autor) Outra; M. A. Alves (Autor) FEUP

Revista

Título: Journal of Non-Newtonian Fluid Mechanics

Vol. 201

Páginas: 10-16

ISSN: 0377-0257

Editora: Elsevier

Indexação

ISI Web of Knowledge - 15 Citações

ISI Web of Science

Scopus - 31 Citações

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia mecânica

Outras Informações

ID Authenticus: P-008-CHC

DOI: 10.1016/j.jnnfm.2013.07.001

Abstract (EN): We report the results of a detailed numerical investigation of inertialess viscoelastic fluid flow through three-dimensional serpentine (or wavy) channels of varying radius of curvature and aspect ratio using the Oldroyd-B model. The results reveal the existence of a secondary flow which is absent for the equivalent Newtonian fluid flow. The secondary flow arises due to the curvature of the geometry and the streamwise first normal stress differences generated in the flowing fluid and can be thought of as the viscoelastic equivalent of Dean vortices. The effects of radius of curvature, aspect ratio and solvent-to-total viscosity ratio on the strength of the secondary flow are investigated. The secondary flow strength is shown to be a function of a modified Deborah number over a wide parameter range.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7