Purpose

This paper aims to examine the squeezing flow of hybrid nanofluid within the two parallel disks. The 50:50% water–ethylene glycol mixture is used as a base fluid to prepare Ag–Fe_3O_4 hybrid nanofluid. Entropy generation analysis is examined by using the second law of thermodynamics, and Darcy’s modal involves estimating the behavior of a porous medium. The influences of Viscous dissipation, Joule heating and thermal radiation in modeling are further exerted into concern.

Design/methodology/approach

For converting partial differential systems to ordinary systems, a transformation technique is used. For the validation part, the numerical solution is computed by embracing a fourth-order exactness program (bvp4c) and compared with the analytical solution added by the homotopy analysis method (HAM). Graphical decisions expose the values of miscellaneous-arising parameters on the velocity, temperature and local-Nusselt numbers.

Findings

Hybrid nanofluid gives significant enhancement in the rate of heat transfer compared with nanofluid. The outcomes indicate that the average Nusselt number and entropy generation are increasing functions of the magnetic field, porosity and Brinkman number. When the thermal radiation rises, the average Nusselt number diminishes and the entropy generation advances. Furthermore, combining silver and magnetite nanoparticles into the water–ethylene glycol base fluid significantly enhances entropy generation performance.

Originality/value

Entropy generation analysis of the magneto-hydrodynamics (MHD) fluid squeezed between two parallel disks by considering Joule heating, viscous dissipation and thermal radiation for different nanoparticles is addressed. Furthermore, an appropriate agreement is obtained in comparing the numerical results with previously published and analytical results.

中文翻译：

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平行盘间Ag-Fe_3O_4/水-乙二醇挤压混合纳米流体流动的熵产生最小化

目的

本文旨在研究两个平行盘内混合纳米流体的挤压流动。以50:50%水-乙二醇混合物为基液制备Ag-Fe_3O_4杂化纳米流体。使用热力学第二定律检查熵生成分析，达西模态涉及估计多孔介质的行为。进一步关注粘性耗散、焦耳热和热辐射对建模的影响。

设计/方法/途径

为了将偏微分系统转换为普通系统，使用了转换技术。对于验证部分，采用四阶精确性程序 (bvp4c) 计算数值解，并与同伦分析法 (HAM) 添加的解析解进行比较。图形决策揭示了速度、温度和局部努塞尔数的杂项参数值。

发现

与纳米流体相比，混合纳米流体显着提高了传热速率。结果表明平均努塞尔数和熵产是磁场、孔隙率和布林克曼数的递增函数。当热辐射增加时，平均努塞尔数减少，熵产生增加。此外，将银和磁铁矿纳米粒子结合到水-乙二醇基液中可显着提高熵产生性能。

原创性/价值

通过考虑焦耳热、粘性耗散和不同纳米粒子的热辐射，解决了在两个平行圆盘之间挤压的磁流体动力学 (MHD) 流体的熵生成分析。此外，在将数值结果与先前公布的分析结果进行比较时获得了适当的协议。