Analytical and numerical study of the electro-osmotic annular flow of viscoelastic fluids

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:420

Article

Ferras, L. L.¹  Afonso, A. M.²  Alves, M. A.²  Nobrega, J. M.¹  Pinho, F. T.³ 

[1] Univ Minho, Inst Polymers & Composites I3N, P-4800058 Guimaraes, Portugal

[2] Univ Porto, Fac Engn, Dept Engn Quim, CEFT, P-4200465 Oporto, Portugal

[3] Univ Porto, Fac Engn, Ctr Estudos Fenomenos Transporte, P-4200465 Oporto, Portugal

关键词: Annular flow;    Analytical solution;    sPTT model;    Slip boundary conditions;   

DOI  :  10.1016/j.jcis.2013.12.043

来源: Elsevier

【 摘 要 】

In this work we present semi-analytical solutions for the electro-osmotic annular flow of viscoelastic fluids modeled by the Linear and Exponential 1'11 models. The viscoelastic fluid flows in the axial direction between two concentric cylinders under the combined influences of electrokinetic and pressure forcings. The analysis invokes the Debye-Hiickel approximation and includes the limit case of pure electro-osmotic flow. The solution is valid for both no slip and slip velocity at the walls and the chosen slip boundary condition is the linear Navier slip velocity model. The combined effects of fluid rheology, electro-osmotic and pressure gradient forcings on the fluid velocity distribution are also discussed. (C) 2013 Elsevier Inc. All rights reserved.

【 授权许可】

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