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    Electro-osmotic and Pressure-Driven Flow in an Eccentric Microannulus
    (Walter De Gruyter Gmbh, 2019) Akyildiz, F. Talay; AlSohaim, Abeer F. A.; Kaplan, Nurhan
    Consideration 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.