Steady viscoelastic fluid flow between parallel plates under electro-osmotic forces: Phan-Thien-Tanner model

• Type: Article in International Scientific Journal
• Date: 2010

Authors

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

Journal

Title: Journal of Colloid and Interface Science

Vol. 344 No. 2

Pages: 513-520

ISSN: 0021-9797

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 59 Citations

ISI Web of Science

Scopus - 80 Citations

COMPENDEX

Scientific classification

FOS: Natural sciences > Chemical sciences

Other information

Authenticus ID: P-003-7FS

DOI: 10.1016/j.jcis.2010.01.025

Abstract (EN): The electro-osmotic flow of a viscoelastic fluid between parallel plates is investigated analytically. The rheology of the fluid is described by the Phan-Thien-Tanner model. This model uses the Gordon-Schowalter convected derivative, which leads to a non-zero second normal stress difference in pure shear flow. A nonlinear Poisson-Boltzmann equation governing the electrical double-layer field and a body force generated by the applied electrical potential field are included in the analysis. Results are presented for the velocity and stress component profiles in the microchannel for different parametric values that characterize this flow. Equations for the critical shear rates and maximum electrical potential that can be applied to maintain a steady fully developed flow are derived and discussed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8