Analytical solution of two-fluid electro-osmotic flows of viscoelastic fluids

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

Autores

A. M. Afonso (Autor) FEUP; M. A. Alves (Autor) FEUP; F. T. Pinho (Autor) FEUP

Revista

Título: Journal of Colloid and Interface Science

Vol. 395

Páginas: 277-286

ISSN: 0021-9797

Editora: Elsevier

Indexação

ISI Web of Knowledge - 30 Citações

ISI Web of Science

Scopus - 42 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Projetos Associados

ELECTROELASTIC - ELECTROELASTIC – Escoamento por electro-osmose de fluídos viscoelásticos em microgeometrias

Outras Informações

ID Authenticus: P-001-ZXE

DOI: 10.1016/j.jcis.2012.12.013

Abstract (EN): This paper presents an analytical model that describes a two-fluid electro-osmotic flow of stratified fluids with Newtonian or viscoelastic rheological behavior. This is the principle of operation of an electro-osmotic two-fluid pump as proposed by Brask et al. [Tech. Proc. Nanotech., 1, 190-193,2003], in which an electrically non-conducting fluid is transported by the interfacial dragging viscous force of a conducting fluid that is driven by electro-osmosis. The electric potential in the conducting fluid and the analytical steady flow solution of the two-fluid electro-osmotic stratified flow in a planar microchannel are presented by assuming a planar interface between the two immiscible fluids with Newtonian or viscoelastic rheological behavior. The effects of fluid rheology, shear viscosity ratio, holdup and interfacial zeta potential are analyzed to show the viability of this technique, where an enhancement of the flow rate is observed as the shear-thinning effects are increased.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10