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Ternary-hybrid nanofluids: significance of suction and dual-stretching on three-dimensional flow of water conveying nanoparticles with various shapes and densities
Zeitschrift für Naturforschung A ( IF 1.8 ) Pub Date : 2021-03-01 , DOI: 10.1515/zna-2020-0317
Thanaa Elnaqeeb 1, 2 , Isaac Lare Animasaun 3 , Nehad Ali Shah 4, 5
Affiliation  

Increasing knowledge of hybrid nanofluid can be traced to its unique improvement of thermal performance and enhancement of heat transfer rate as applicable in the dynamics of fuel and coolant in automobiles. However, the case of water-based nanofluid conveying three kinds of nanoparticles (i.e., ternary-hybrid nanofluid) with various shapes and densities is far-fetched. The transport phenomena of water conveying smaller densities nanoparticles (i.e., copper nanotubes, graphene, and aluminum oxide) and substantial large densities of nanoparticles (i.e., copper oxide, copper, and silver) of various types through a rectangular closed domain with major emphasis on the significance of suction and dual stretching was investigated. The dimensional equation that model the aforementioned transport phenomenon, for the two cases, were non-dimenzionalized using appropriate similarity variables, parameterized, and solved numerically using shooting techniques together with fourth-order Runge-Kutta integration scheme and in-built bvp4c package of MATLAB. Enhancement in suction and stretching ratio causes the vertical velocity of the motion along x -direction and Nusselt number to be an increasing function. Due to an increase in suction and stretching ratio, fluid flow along ( x , y )-directions, temperature distribution, and the local skin friction coefficients are decreasing functions. At all the levels of suction and stretching ratio, higher Nusselt numbers were found in the case of water conveying Copper oxide, Copper, and Silver nanoparticles due to their heavy densities.

中文翻译:

三元混合纳米流体:吸力和双重拉伸对输运具有各种形状和密度的纳米颗粒的三维水流的意义

对混合纳米流体的了解不断增加,可以归因于其独特的热性能改善和传热速率的提高,适用于汽车燃料和冷却剂的动力学。然而,水基纳米流体输送具有各种形状和密度的三种纳米颗粒(即三元混合纳米流体)的情况是牵强的。水通过矩形封闭区域传输各种类型的较小密度的纳米颗粒(例如,铜纳米管,石墨烯和氧化铝)和相当大密度的纳米颗粒(例如,氧化铜,铜和银)的传输现象。研究了吸力和双重拉伸的重要性。在这两种情况下,对上述传输现象进行建模的尺寸方程,使用适当的相似性变量对这些变量进行非维数化,参数化,并使用射击技术,四阶Runge-Kutta积分方案和MATLAB的内置bvp4c软件包进行数值求解。吸力和拉伸比的提高导致沿x方向运动的垂直速度和Nusselt数成为增加的函数。由于吸力和拉伸比的增加,沿着(x,y)方向的流体流动,温度分布和局部皮肤摩擦系数正在减小。在所有吸力和拉伸比水平下,由于水的密度高,因此在水输送氧化铜,铜和银纳米颗粒的情况下,发现较高的努塞尔数。并使用射击技术,四阶Runge-Kutta集成方案和MATLAB的内置bvp4c软件包进行了数值求解。吸力和拉伸比的提高导致沿x方向运动的垂直速度和Nusselt数成为增加的函数。由于吸力和拉伸比的增加,沿着(x,y)方向的流体流动,温度分布和局部皮肤摩擦系数正在减小。在所有吸力和拉伸比水平下,由于水的密度高,因此在水输送氧化铜,铜和银纳米颗粒的情况下,发现较高的努塞尔数。并使用射击技术,四阶Runge-Kutta集成方案和MATLAB的内置bvp4c软件包进行了数值求解。吸力和拉伸比的提高导致沿x方向运动的垂直速度和Nusselt数成为增加的函数。由于吸力和拉伸比的增加,沿着(x,y)方向的流体流动,温度分布和局部皮肤摩擦系数正在减小。在所有吸力和拉伸比水平下,由于水的密度高,因此在水输送氧化铜,铜和银纳米颗粒的情况下,发现较高的努塞尔数。吸力和拉伸比的提高导致沿x方向运动的垂直速度和Nusselt数成为增加的函数。由于吸力和拉伸比的增加,沿着(x,y)方向的流体流动,温度分布和局部皮肤摩擦系数正在减小。在所有吸力和拉伸比水平下,由于水的密度高,因此在水输送氧化铜,铜和银纳米颗粒的情况下,发现较高的努塞尔数。吸力和拉伸比的提高导致沿x方向运动的垂直速度和Nusselt数成为增加的函数。由于吸力和拉伸比的增加,沿着(x,y)方向的流体流动,温度分布和局部皮肤摩擦系数正在减小。在所有吸力和拉伸比水平下,由于水的密度高,因此在水输送氧化铜,铜和银纳米颗粒的情况下,发现较高的努塞尔数。
更新日期:2021-03-16
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