You Xiangcheng, Wang Yanbin
National Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing 102249, China.
Nanomaterials (Basel). 2024 Feb 4;14(3):0. doi: 10.3390/nano14030316.
Hybrid nanofluids have many real-world applications. Research has shown that mixed nanofluids facilitate heat transfer better than nanofluids with one type of nanoparticle. New applications for this type of material include microfluidics, dynamic sealing, and heat dissipation. In this study, we began by placing copper into HO to prepare a Cu-HO nanofluid. Next, Cu-HO was combined with AlO to create a Cu-AlO-HO hybrid nanofluid. In this article, we present an analytical study of the estimated flows and heat transfer of incompressible three-dimensional magnetohydrodynamic hybrid nanofluids in the boundary layer. The application of similarity transformations converts the interconnected governing partial differential equations of the problem into a set of ordinary differential equations. Utilizing the homotopy analysis method (HAM), a uniformly effective series solution was obtained for the entire spatial region of 0 < < ∞. The errors in the HAM calculation are smaller than 1 × 10 when compared to the results from the references. The volume fractions of the hybrid nanofluid and magnetic fields have significant impacts on the velocity and temperature profiles. The appearance of magnetic fields can alter the properties of hybrid nanofluids, thereby altering the local reduced friction coefficient and Nusselt numbers. As the volume fractions of nanoparticles increase, the effective viscosity of the hybrid nanofluid typically increases, resulting in an increase in the local skin friction coefficient. The increased interaction between the nanoparticles in the hybrid nanofluid leads to a decrease in the Nusselt number distribution.
混合纳米流体有许多实际应用。研究表明，混合纳米流体比含有一种类型纳米颗粒的纳米流体更有利于传热。这类材料的新应用包括微流体、动态密封和散热。在本研究中，我们首先将铜放入水中制备铜 - 水纳米流体。接下来，将铜 - 水与氧化铝结合以创建铜 - 氧化铝 - 水混合纳米流体。在本文中，我们对边界层中不可压缩三维磁流体动力学混合纳米流体的估计流动和传热进行了分析研究。相似变换的应用将该问题相互关联的控制偏微分方程转化为一组常微分方程。利用同伦分析方法（HAM），在0 < < ∞的整个空间区域获得了一致有效的级数解。与参考文献的结果相比，HAM计算中的误差小于1×10 。混合纳米流体的体积分数和磁场对速度和温度分布有显著影响。磁场的出现可以改变混合纳米流体的性质，从而改变局部折合摩擦系数和努塞尔数。随着纳米颗粒体积分数的增加，混合纳米流体的有效粘度通常会增加，导致局部表面摩擦系数增加。混合纳米流体中纳米颗粒之间相互作用的增加导致努塞尔数分布减小。
