SWCNT- MWCNT/ h2o在上下旋转圆盘上混合流动的理论分析

IF 4.2 Q2 NANOSCIENCE & NANOTECHNOLOGY
R. J. P. Gowda, R. Naveenkumar, J. Madhukesh, B. Prasannakumara, R. Gorla
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引用次数: 17

摘要

通过各种磁盘运动的流动在制造过程中有广泛的应用,如计算机存储设备,旋转机械,电子和各种类型的医疗设备。受这些应用的启发,我们仔细研究了均相-非均相反应和均匀热源/汇对三维(3D)混合swcnts - mwcnt随时间向上/向下旋转圆盘流动的影响。本文最著名的创新之处在于将单壁碳纳米管与多壁碳纳米管混合制成纳米流体。不上下移动的磁盘产生热量/吸收效应在磁盘上产生双重流动。另外,磁盘的旋转和垂直运动在表面上产生3D流,这在公开文献中尚未考虑。通过选择合适的相似性变量和边界约束,将模型的偏微分方程简化为偏微分方程。在这里,我们使用RKF-45方法,采用射击技术获得数值近似。用图表分析了传热速率。此外,还简要讨论了各种无量纲参数的速度、温度和浓度变化曲线,并用合适的图加以说明。结果表明,均相和非均相反应参数值的增大使反应速率加快,从而使分布速率降低,浓度梯度减小。膨胀/收缩参数的增大增大了速度梯度和热梯度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Theoretical analysis of SWCNT- MWCNT/ H 2 O hybrid flow over an upward/downward moving rotating disk
The flow-through various disk movement has wide range of applications in manufacturing processes like, computer storage equipment’s, rotating machines, electronic and various types of medical equipment’s. Inspired from these applications, here we scrutinised the consequences of homogeneous-heterogeneous reactions and uniform heat source/sink on the three-dimensional (3D) hybrid SWCNT-MWCNT’s flow on time dependent moving upward/downward rotating disk. The renowned innovation of this paper is the application of the hybrid nanofluid made up of SWCNT and MWCNT’s. Heat generation/absorption effect for the disk that does not move up or down creates a dual flow on the disk. Alternatively, the rotation and upright motion of the disk creates a 3D flow on the surface which has not been considered in the open literature. The modelled PDE’s are reduced in to ODE’s by opting suitable similarity variables and boundary constraints. Here, we used RKF-45 method to obtain the numerical approximations by adopting shooting technique. The analysis of rate of heat transfer is done through graphs. Further, change in velocity, thermal and concentration profiles for various non-dimensional parameters are deliberated briefly and illustrated with the help of suitable plots. The results reveal that, the, rise in values of homogeneous and heterogeneous reaction parameters improve the rate of reaction which results in reduction of the distribution rate and diminishes the concentration gradient. An increase in expansion/contraction parameter enhances the velocity and thermal gradients.
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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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