Akyildiz, F. TalayAlSohaim, Abeer F. A.Kaplan, Nurhan2024-11-072024-11-0720190932-07841865-7109https://doi.org/10.1515/zna-2018-0483https://hdl.handle.net/11480/15711Consideration is given to steady, fully developed mixed electro-osmotic/pressure-driven flow of Newtonian fluid in an eccentric microannulus. The governing Poisson-Boltzmann and momentum equations are solved numerically in bipolar coordinates. It is shown that for a fixed aspect ratio, fully eccentric channels sustain the maximum average viscosity (i.e. flow rate) under the same dimensionless pressure gradient and electro kinetic radius. For the Debye-Huckel approximation (linearised Poisson-Boltzmann equation), we show that closed-form analytical solution can be derived for velocity field. Finally, the effect of the electrokinetic radius, pressure gradient, and eccentricity on the flow field was investigated in detail.eninfo:eu-repo/semantics/closedAccessBipolar CoordinatesDebye-Huckel ApproximationEccentric MicroannulusElectro-osmotic FlowFinite Difference MethodPoisson-Boltzmann EquationArticle74651352110.1515/zna-2018-04832-s2.0-85063097790Q3WOS:000471601100005Q3