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水基混合纳米流体在多孔腔内的流动模拟及其传热应用。

Simulation of the water-based hybrid nanofluids flow through a porous cavity for the applications of the heat transfer.

机构信息

DoST, Directorate General of Science & Technology, Khyber Pakhtunkhwa, Peshawar, 25000, Pakistan.

Mechanical Engineering Department, Khalifa University of Science and Technology, P. O. Box 127788, Abu Dhabi, United Arab Emirates.

出版信息

Sci Rep. 2023 Apr 28;13(1):7009. doi: 10.1038/s41598-023-33650-w.

Abstract

This study looks at the natural convections of Cu + AlO/HO nanofluid into a permeable chamber. The magnetic field is also executed on the flow field and the analysis has been approached numerically by the control volume method. The study of hybrid nanofluid heat in terms of the transfer flux was supplemented with a wide range of parameters of hybrid nanofluid fractions, Rayleigh numbers Hartmann numbers and porosity factor. It's also determined that the flow and thermal distribution are heavily affected by the concentration of the nanoparticles. The concentration of nanoparticles increases the transport of convective energy inside the enclosure. The primary findings demonstrate that a rise in both the Rayleigh number and Darcy number leads to an improvement in convective heat transfer within the enclosure. However, the porosity has a negligible effect. Additionally, the rotation in a clockwise direction has a beneficial impact on the dispersion of heat transfer throughout the cavity. Furthermore, it is concluded that hybrid nanofluids are more reliable than conventional fluids in improving thermal properties.

摘要

本研究着眼于 Cu+AlO/HO 纳米流体在可渗透腔内的自然对流。磁场也作用于流场,通过控制体积法对流动进行了数值分析。通过混合纳米流体分数、瑞利数、哈特曼数和孔隙因子等广泛参数,对混合纳米流体的传热通量进行了补充研究。结果表明,纳米颗粒的浓度对流动和热分布有很大的影响。纳米颗粒的浓度增加了腔内的对流能量传递。主要发现表明,瑞利数和达西数的增加都导致腔内的对流换热得到改善。然而,孔隙率的影响可以忽略不计。此外,顺时针旋转对整个腔体内的传热分散有有益的影响。此外,还得出结论,混合纳米流体在改善热性能方面比传统流体更可靠。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9ee8/10147631/703f78783a55/41598_2023_33650_Fig1_HTML.jpg

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