To help in the efficient design of fluid flow in electroosmotic pumps, electroosmotic flow of non-Newtonian fluid through porous polymer membrane at high zeta potentials is studied by mainly evaluating the total flow rate at different physical parameters. Non-Newtonian fluid is represented by the power-law model and the porous polymer membrane is considered as arrays of straight cylindrical pores. The electroosmotic flow of non-Newtonian fluid through a single pore is studied by solving the complete Poisson–Boltzmann equation and the modified Cauchy momentum equation. Then assuming the pore size distribution on porous polymer membrane obeys Gaussian distribution, the performance of electroosmotic pump operating non-Newtonian fluid is evaluated by computing the total flow rate of electroosmotic flow through porous polymer membrane as a function of flow behavior index, geometric parameters of porous membrane, electrolyte concentration, applied voltage, and zeta potential. It is found that enhancing zeta potential and bulk concentration rather than the applied voltage can also significantly improve the total flow rate in porous polymer membrane, especially in the case of shear thinning fluid.

中文翻译：

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非Zeton流体在高Zeta电位下在多孔聚合物膜中的电渗流

为了帮助高效设计电渗泵中的流体，主要通过评估不同物理参数下的总流速来研究非牛顿流体在高Zeta电位下通过多孔聚合物膜的电渗流。非牛顿流体用幂律模型表示，多孔聚合物膜被视为直圆柱孔阵列。通过求解完整的Poisson–Boltzmann方程和修正的Cauchy动量方程，研究了非牛顿流体通过单孔的电渗流。然后假设多孔聚合物膜上的孔径分布服从高斯分布，通过计算流经多孔聚合物膜的电渗流的总流速与流动行为指数，多孔膜的几何参数，电解质浓度，施加电压和zeta电位的函数，可评估电渗泵在非牛顿流体下的性能。发现提高ζ电势和体积浓度而不是施加电压也可以显着改善多孔聚合物膜中的总流速，特别是在剪切稀化流体的情况下。