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考虑分子直径和凝固温度时纳米流体在福克纳-斯坎流中的热增强。

Thermal enhancement in Falkner-Skan flow of the nanofluid by considering molecular diameter and freezing temperature.

作者信息

Murtaza Rashid, Hussain Iftikhar, Rehman Ziaur, Khan Ilyas, Andualem Mulugeta

机构信息

Department of Mathematics, Mohi-ud-Din Islamic University, Nerian Sharif, AJ&K, 12080, Pakistan.

Department of Civil and Environmental Engineering, College of Engineering, Majmaah University, Majmaah, Al-Majmaah, 11952, Saudi Arabia.

出版信息

Sci Rep. 2022 Jun 8;12(1):9415. doi: 10.1038/s41598-022-13423-7.

Abstract

The analysis of nanofluids heat transfer over a wedge is very important due to their wider applications in applied thermal engineering, chemical engineering and biomedical engineering etc. Therefore, aim of the study is to explore the heat transport in nanofluid over a wedge (Falkner Skan flow) under viscous dissipation and thermal radiation over a wedge. The proper model formulation is carried out via similarity relations and empirical correlations of the nanofluids. After successful model transformation, numerical scheme (RK technique along with shooting technique) applied and furnished the results over the desired domain under varying effects of preemenant flow parameters. The results revealed that the velocity rises for opposing ([Formula: see text]) and assisting ([Formula: see text]) flows against [Formula: see text] and significant contribution of Ec and imposed thermal radiations (Rd number) observed in thermal performance of the nanofluid. The temperature declines by strengthen [Formula: see text] and optimum decrement is noted for opposing flow. Finally, a comparison is provided for various values of [Formula: see text] ([Formula: see text]) with previously published work under certain restrictions and found an excellent agreement.

摘要

由于纳米流体在应用热工程、化学工程和生物医学工程等领域有广泛应用,因此对楔形物上纳米流体传热的分析非常重要。因此,本研究的目的是探讨在粘性耗散和热辐射作用下,纳米流体在楔形物(福克纳 - 斯坎流)上的热传输情况。通过纳米流体的相似关系和经验关联式进行适当的模型构建。成功进行模型转换后,应用数值方案(龙格 - 库塔技术结合打靶技术),并在不同永久流动参数的影响下,给出了所需区域的结果。结果表明,对于与[公式:见原文]相反([公式:见原文])和辅助([公式:见原文])的流动,速度会上升,并且在纳米流体的热性能中观察到埃克特数(Ec)和外加热辐射(Rd数)的显著贡献。通过增强[公式:见原文],温度会下降,并且对于逆流观察到最佳降幅。最后,在一定限制条件下,对[公式:见原文]([公式:见原文])的各种值与先前发表的工作进行了比较,发现吻合度很高。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5428/9177856/621104483ab7/41598_2022_13423_Fig1_HTML.jpg

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