Abstract The behaviour of microchannel flow of a nanofluid between two parallel flat plates in the presence of the electrical double layer (EDL) is investigated in this paper. The problem is formulated based on the Buongiorno nanofluid model with the electrical body force due to the EDL being considered in the momentum equation. As one of the highlights of the present investigation, the unphysical assumption introduced in previous studies often leading to the discontinuities of flow field that the electrostatic potential in the middle of the channel has to be equal to zero is eliminated. In addition, the inappropriate assumption that the pressure constant is treated as a known condition is also rectified. The new model is developed with the governing equations being reduced by a set of dimensionless quantities to a set of coupled ordinary differential equations. Based on the analytical approximations, the influences of various physical parameters on the flow field and temperature field, and the important physical quantities of practical interests are analysed and discussed in detail.

中文翻译：

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具有界面电动效应的微通道中的纳米流体流动和传热

摘要 本文研究了双电层（EDL）存在下纳米流体在两个平行平板之间的微通道流动行为。该问题是基于 Buongiorno 纳米流体模型制定的，由于在动量方程中考虑了 EDL，因此具有电体力。作为本次调查的亮点之一，先前研究中引入的非物理假设通常会导致通道中间的静电势必须为零的流场不连续性被消除。此外，还纠正了将压力常数视为已知条件的不恰当假设。新模型是通过将控制方程通过一组无量纲量简化为一组耦合常微分方程而开发的。在解析近似的基础上，详细分析和讨论了各种物理参数对流场和温度场的影响，以及具有实际意义的重要物理量。