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Cu-Al2O3/water hybrid nanofluid flow over a permeable moving surface in presence of hydromagnetic and suction effects
Alexandria Engineering Journal ( IF 6.8 ) Pub Date : 2020-02-21 , DOI: 10.1016/j.aej.2020.01.028
Nur Adilah Liyana Aladdin , Norfifah Bachok , I. Pop

In this new era of technology in fluid field, hybrid nanofluid has become a fruitful interest topic among researchers due to it thermal properties and potential which gives better result compared to nanofluid in enhancing the heat transfer rate. The intention here is to present the significant effects of suction and magnetic field over a moving plate containing hybrid nanofluid with base fluid is water, Alumina Oxide (Al2O3) and Copper (Cu) as the nanoparticles. A mathematical modelling consists of partial differential equation for the fluid flow are constructed and transformed to a set of ordinary differential equations hence solved numerically using bvp4c in MATLAB. Effects of magnetohydrodynamics (MHD), M, suction, S and relevant thermophysical properties on velocity, temperature, skin friction,Cf and local Nusselt,Nux number are thoroughly examined and presented graphically. It is noted that duality exists in certain range when λc<-1and unique solution at λ>-1. The range on duality of solution are widen as the values of M and S increase. Due to that, a stability analysis is implied to determine which duality of solution is stable and realizable. As M and ϕ2increase, the skin friction increases. For rate of heat transfer, as M increase, the heat transfer rate increase while for arising of ϕ2, the heat transfer decrease. Furthermore, it is noted that the hybrid nanofluid possess better result compared to nanofluid.



中文翻译:

Cu-Al 2 O 3 /水杂化纳米流体在存在水磁效应和吸力效应的情况下流过可渗透运动表面

在这个流体领域的新技术时代,杂化纳米流体由于其热性质和潜力而成为研究人员感兴趣的话题,与纳米流体相比,其在提高传热速率方面具有更好的效果。本文的目的是在包含作为基础流体的混合纳米流体与水,氧化铝(Al 2 O 3)和铜(Cu)的纳米颗粒的移动板上呈现吸力和磁场的显着影响。建立了由流体的偏微分方程组成的数学模型,并将其转换为一组常微分方程,因此使用MATLAB中的bvp4c进行了数值求解。磁流体动力学(MHD),M,吸力,S的影响 以及有关速度,温度,皮肤摩擦,CF 还有本地的NusseltñüX编号已彻底检查并以图形方式显示。需要注意的是,当λC<--1个和独特的解决方案 λ>--1个。随着MS值的增加,解对偶性的范围变宽。因此,需要进行稳定性分析,以确定哪种对偶性是稳定且可实现的。作为Mϕ2增加,皮肤摩擦增加。对于传热速率,随着M的增加,传热速率增加,而对于ϕ2,传热减少。此外,应注意的是,与纳米流体相比,杂化纳米流体具有更好的结果。

更新日期:2020-02-21
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