Electro-osmotic flow of viscoelastic fluids in microchannels under asymmetric zeta potentials

• Type: Article in International Scientific Journal
• Date: 2011

Authors

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

Journal

Title: Journal of Engineering Mathematics

Vol. 71 No. 1

Pages: 15-30

ISSN: 0022-0833

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 46 Citations

ISI Web of Science

Scopus - 60 Citations

INSPEC

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-002-NHQ

DOI: 10.1007/s10665-010-9421-9

Abstract (EN): The flow of viscoelastic fluids between parallel plates under the combined influence of electro-osmotic and pressure gradient forcings with asymmetric boundary conditions, by considering different zeta potentials at the walls, is investigated. The fluids are z-z symmetric electrolytes. The analytic solutions of the electrical potential, velocity distributions and streaming potential are based on the Debye-Huckel approximation for weak potential. The viscoelastic fluids used are modelled by the simplified Phan-Thien-Tanner constitutive equation, with linear kernel for the stress coefficient function, and the Finitely Extensible Nonlinear Elastic dumbbells model with a Peterlin approximation for the average spring force. The combined effects of fluid rheology, electrical double-layer thickness, ratio of the wall zeta potentials and ratio between the applied streamwise gradients of electrostatic potential and pressure on the fluid velocity and stress distributions are discussed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16