Marangoni convection of γ-Al2O3-water/ethylene glycol nanofluids with the inclusion of nonlinear thermal radiation

IF 4.2 Q2 NANOSCIENCE & NANOTECHNOLOGY
P. Mathur, Satyaranjan Mishra, P. K. Pattnaik
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引用次数: 2

Abstract

The current study used convective heat transfer properties to investigate the Marangoni convection flow of oxide particles within water and ethylene glycol past a linearly expanding sheet. The flow characteristic is enhanced by the inclusion of nonlinear thermal radiation in the heat transfer phenomenon. The model is properly designed in conjunction with the appropriate assumption of the effective properties of the nanofluid, such as viscosity, conductivity, and the Prandtl number, among others. However, the flow analysis of γ− Al2 O3 nanofluid embedding with the permeable medium affects the behavior of the contributing parameters. The non-dimensional forms of the governing equations designed with the above-mentioned properties are obtained by selecting the appropriate similarity transformation. Furthermore, the Runge–Kutta–Fehlberg numerical method is used to solve these sets of formulated problems from case studies. The flow domain’s behavior when several relevant parameters are varied is depicted graphically and briefly described. However, the major contributions are; inclusion of particle concentration accelerates the nanofluid temperature whereas the fluid velocity decelerates near the sheet region, and further it shows its opposite impact. The resistance offered by the permeability of the porous medium attenuates the fluid velocity significantly.
含非线性热辐射的γ- al2o3 -水/乙二醇纳米流体的Marangoni对流
目前的研究使用对流传热特性来研究氧化颗粒在水和乙二醇中通过线性膨胀片的马兰戈尼对流流动。在传热现象中加入非线性热辐射,增强了流动特性。该模型的设计与纳米流体有效特性的适当假设相结合,如粘度、电导率和普朗特数等。然而,γ−al2o3纳米流体与渗透介质包埋的流动分析影响了贡献参数的行为。利用上述性质设计的控制方程的无量纲形式通过选择适当的相似变换得到。此外,通过实例研究,采用龙格-库塔-费伯格数值方法来求解这些公式化问题。以图形的形式简要描述了几个相关参数变化时流域的行为。然而,主要的贡献是;颗粒浓度的增加使纳米流体温度升高,而流体速度在薄片附近减慢,并进一步表现出相反的影响。多孔介质的渗透性所提供的阻力使流体速度显著衰减。
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来源期刊
CiteScore
6.00
自引率
1.70%
发文量
24
期刊介绍: Proceedings of the Institution of Mechanical Engineers Part N-Journal of Nanomaterials Nanoengineering and Nanosystems is a peer-reviewed scientific journal published since 2004 by SAGE Publications on behalf of the Institution of Mechanical Engineers. The journal focuses on research in the field of nanoengineering, nanoscience and nanotechnology and aims to publish high quality academic papers in this field. In addition, the journal is indexed in several reputable academic databases and abstracting services, including Scopus, Compendex, and CSA's Advanced Polymers Abstracts, Composites Industry Abstracts, and Earthquake Engineering Abstracts.
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