Abstract

Solar thermal collectors disperse and collect the solar radiation with its further conversion into thermal energy through solar thermal concentrating systems, which frequently use nanofluids as a heat transporter. The present research makes emphasis on the analysis of the magnetohydrodynamics (MHD) of flow of hybrid nanofluid (HNF) and conventional nanofluid (CNF) between two rotating plates. The flow is induced by an exponentially stretching sheet in a parabolic trough solar collector (PTSC). Owing to a similarity transformation, partial differential equations with boundary constraints were converted to a simpler case of nonlinear ordinary-differential formulas. The Keller-box process is introduced for finding an approximate solution of the ordinary reduced differential equations. Hybrid nanofluid, which consists of two kinds of nanoparticles, copper (Cu) and aluminium (Al) with Newtonian water (H₂O) base fluid, is considered. The key idea of this article is to scrutinize the impact of variation of significant parameters on the velocity, temperature, and heat transport rate for Al–H₂O nanofluid and Cu–Al/H₂O hybrid nanofluid. The results evidence that the hybrid nanofluid (Cu–Al/H₂O) has a lower friction factor and higher heat transmission rate as compared with the conventional nanofluid (Al–H₂O). Furthermore, the rotation parameter decelerates the heat transport rate. To visualize the fluid flow, streamlines are drawn for different values of the suction/injection parameter.

中文翻译：

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3D MHD 旋转混合纳米流体在抛物槽式太阳能集热器平行板之间流动的传热模拟：数值研究

摘要

太阳能集热器通过太阳能集热系统分散和收集太阳辐射，并将其进一步转化为热能，该系统经常使用纳米流体作为热传输器。目前的研究重点分析了混合纳米流体 (HNF) 和常规纳米流体 (CNF) 在两个旋转板之间流动的磁流体动力学 (MHD)。该流动是由抛物线槽式太阳能收集器 (PTSC) 中的指数拉伸片引起的。由于相似变换，具有边界约束的偏微分方程被转换为非线性常微分公式的更简单的情况。引入了 Keller-box 过程来寻找常约化微分方程的近似解。混合纳米流体，由两种纳米粒子组成，₂ O) 基液，被考虑在内。本文的主要思想是仔细研究重要参数的变化对 Al-H ₂ O 纳米流体和 Cu-Al/H ₂ O 混合纳米流体的速度、温度和热传输速率的影响。结果表明，与传统纳米流体（Al-H ₂ O）相比，混合纳米流体（Cu-Al/H ₂ O）具有更低的摩擦系数和更高的传热率。此外，旋转参数会降低热传输速率。为了可视化流体流动，针对吸入/注入参数的不同值绘制了流线。