An exact analysis of radiation absorption and Dufour effect on MHD convective flow of Cu-water nanofluid with heat generation and chemical reaction

IF 2.6 4区 物理与天体物理 Q2 PHYSICS, APPLIED
Rajdeep Bordoloi, Dipunja Gohain, Nazibuddin Ahmed, Ali J. Chamkha
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Abstract

The combined effects of diffusion-thermo and radiative absorption on free convective hydromagnetic heat-generating chemically reactive flow of Cu-water nanofluid past an instantaneously accelerated unlimited vertical plate nested in a porous medium are investigated. A comparative analysis is executed for both isothermal and ramped conditions. The set of transformed domain equations has been obtained using a closed form of the Laplace transform method with the help of the Heaviside step function. Graphical and tabular explanations are provided for the physical characteristics of several flow parameters affecting the problem. Graphs are generated using MATLAB computing software. Findings of the problem manifest that the diffusion-thermo parameter and the radiation absorption parameter intensify the velocity and fluid temperature in the entire fluid area. This augmentation is most prominent for copper nanoparticles. Concentration, temperature, and velocity profiles in the case of ramped conditions are less than in isothermal conditions. Furthermore, the ramped parameter amplifies the heat transfer rate while reversing the mass transfer rate. It is also established that the volume concentration of nanoparticles enhances the heat transfer rate. The present study is of great interest in numerous fields of industry and machine-building applications.
辐射吸收和Dufour效应对cu -水纳米流体MHD对流的精确分析
研究了扩散热和辐射吸收对铜水纳米流体通过多孔介质中瞬时加速无限垂直板的自由对流磁热化学反应流动的影响。对等温条件和斜坡条件进行了比较分析。利用拉普拉斯变换方法的封闭形式,借助于Heaviside阶跃函数,得到了变换后的域方程组。对影响该问题的几个流动参数的物理特性进行了图解和表格解释。利用MATLAB计算软件生成图形。问题的结果表明,扩散热参数和辐射吸收参数加剧了整个流体区域的速度和流体温度。这种增强作用在铜纳米颗粒中最为突出。坡道条件下的浓度、温度和速度分布比等温条件下的要小。此外,斜坡参数放大了传热速率,同时逆转了传质速率。纳米颗粒的体积浓度提高了传热速率。目前的研究在许多工业领域和机械制造应用中具有很大的兴趣。
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来源期刊
International Journal of Modern Physics B
International Journal of Modern Physics B 物理-物理:凝聚态物理
CiteScore
3.70
自引率
11.80%
发文量
417
审稿时长
3.1 months
期刊介绍: Launched in 1987, the International Journal of Modern Physics B covers the most important aspects and the latest developments in Condensed Matter Physics, Statistical Physics, as well as Atomic, Molecular and Optical Physics. A strong emphasis is placed on topics of current interest, such as cold atoms and molecules, new topological materials and phases, and novel low dimensional materials. One unique feature of this journal is its review section which contains articles with permanent research value besides the state-of-the-art research work in the relevant subject areas.
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