This article deals with the numerical simulation of the electroosmotic flow of methanol-based aluminum oxide (Al₂O₃–CH₃OH) nanofluid in a tapered microchannel. The shear-thickening attributes of methanol are characterized by the Sisko fluid model. The tapered microchannel walls move with peristaltic wave velocity. Buongiorno model in combination with the Corcione model for thermal conductivity and viscosity is employed to predict the heat transfer characteristics of Al₂O₃–methanol nanofluid. The Maxwell–Garnett model is employed to compute the effective electric conductivity of nanofluids. The effect of the porous medium in the flow field is signified by modified Darcy’s law. The salient attributes of viscous dissipation and Joule heating caused by electroosmosis are also taken into account. The approximations of the lubrication approach and the Debye–Hückel linearization are invoked in mathematical formulation for considerable simplification of the flow problem. The solutions of the acquired set of nonlinear governing equations are computed numerically through Maple 17. The graphical results for various physical quantities are also presented for physical interpretation and discussion. It is revealed that fluid becomes more viscous for enhancement in the consistency parameter. Furthermore, maintaining a larger temperature difference within microchannel produces a reduction in the concentration of nanoparticles. Temperature and velocity profiles are strongly dependent on the electroosmosis mechanism. The simulated results will be very important for designing biomicrofluidics devices dealing with rheologically complex fluids such as lubricating greases, blood, saliva or mucus.

本文研究了锥形微通道中基于甲醇的氧化铝（Al ₂ O ₃ -CH ₃ OH）纳米流体的电渗流的数值模拟。Sisko流体模型表征了甲醇的剪切增稠特性。锥形微通道壁随蠕动波速度移动。将Buongiorno模型与Corcione模型相结合的热导率和粘度用于预测Al ₂ O ₃的传热特性–甲醇纳米流体。麦克斯韦-加纳特模型用于计算纳米流体的有效电导率。修正的达西定律表明了多孔介质在流场中的作用。还考虑了电渗引起的粘性耗散和焦耳热的显着属性。在数学公式中调用了润滑方法和Debye-Hückel线性化的近似值，以极大地简化了流动问题。通过Maple 17对获得的一组非线性控制方程的解进行数值计算。还给出了各种物理量的图形结果，以供物理解释和讨论。揭示了流体变得更粘稠，以提高稠度参数。此外，维持微通道内较大的温差会降低纳米颗粒的浓度。温度和速度曲线在很大程度上取决于电渗机理。模拟结果对于设计处理流变复杂流体（如润滑脂，血液，唾液或粘液）的生物微流体装置非常重要。