Saqib Muhammad, Khan Ilyas, Shafie Sharidan, Mohamad Ahmad Qushairi
Department of Mathematical Sciences, Faculty of Science, Universiti Teknologi Malaysia JB, 81310, Johor Bahru, Johor, Malaysia.
Department of Mathematics, College of Science Al-Zulfi, Majmaah University, Al-Majmaah, 11952, Saudi Arabia.
Sci Rep. 2021 Feb 12;11(1):3725. doi: 10.1038/s41598-020-78421-z.
The colloidal suspension of nanometer-sized particles of FeO in traditional base fluids is referred to as Ferro-nanofluids. These fluids have many technological applications such as cell separation, drug delivery, magnetic resonance imaging, heat dissipation, damping, and dynamic sealing. Due to the massive applications of Ferro-nanofluids, the main objective of this study is to consider the MHD flow of water-based Ferro-nanofluid in the presence of thermal radiation, heat generation, and nanoparticle shape effect. The Caputo-Fabrizio time-fractional Brinkman type fluid model is utilized to demonstrate the proposed flow phenomenon with oscillating and ramped heating boundary conditions. The Laplace transform method is used to solve the model for both ramped and isothermal heating for exact solutions. The ramped and isothermal solutions are simultaneously plotted in the various figures to study the influence of pertinent flow parameters. The results revealed that the fractional parameter has a great impact on both temperature and velocity fields. In the case of ramped heating, both temperature and velocity fields decreasing with increasing fractional parameter. However, in the isothermal case, this trend reverses near the plate and gradually, ramped, and isothermal heating became alike away from the plate for the fractional parameter. Finally, the solutions for temperature and velocity fields are reduced to classical form and validated with already published results.
传统基液中纳米级FeO颗粒的胶体悬浮液被称为铁纳米流体。这些流体有许多技术应用,如细胞分离、药物递送、磁共振成像、散热、阻尼和动态密封。由于铁纳米流体的大量应用,本研究的主要目的是考虑在热辐射、热生成和纳米颗粒形状效应存在的情况下水基铁纳米流体的磁流体动力学流动。利用Caputo-Fabrizio时间分数阶Brinkman型流体模型来描述在振荡和斜坡加热边界条件下所提出的流动现象。采用拉普拉斯变换方法求解斜坡加热和等温加热情况下的模型以获得精确解。在各种图中同时绘制斜坡加热和等温加热的解,以研究相关流动参数的影响。结果表明,分数阶参数对温度场和速度场都有很大影响。在斜坡加热的情况下,温度场和速度场都随着分数阶参数的增加而减小。然而,在等温情况下,在平板附近这种趋势会反转,并且对于分数阶参数,远离平板时斜坡加热和等温加热逐渐变得相似。最后,温度场和速度场的解简化为经典形式,并与已发表的结果进行了验证。