Rehman Aziz Ur, Riaz Muhammad Bilal, Wojciechowski Adam
Department of Mathematics, University of Management and Technology, 54770 Lahore, Pakistan.
Faculty of Technical Physics, Information Technology and Applied Mathematics, Lodz University of Technology, 90-924, Lodz, Poland.
Sci Rep. 2022 Nov 2;12(1):18437. doi: 10.1038/s41598-022-21773-5.
The aim of this article is to investigate the exact solution by using a new approach for the thermal transport phenomena of second grade fluid flow under the impact of MHD along with exponential heating as well as Darcy's law. The phenomenon has been expressed in terms of partial differential equations, then transformed the governing equations in non-dimentional form. For the sake of better rheology of second grade fluid, developed a fractional model by applying the new definition of Constant Proportional-Caputo hybrid derivative (CPC), Atangana Baleanu in Caputo sense (ABC) and Caputo Fabrizio (CF) fractional derivative operators that describe the generalized memory effects. For seeking exact solutions in terms of Mittag-Leffler and G-functions for velocity, temperature and concentration equations, Laplace integral transformation technique is applied. For physical significance of various system parameters on fluid velocity, concentration and temperature distributions are demonstrated through various graphs by using graphical software. Furthermore, for being validated the acquired solutions, accomplished a comparative analysis with some published work. It is also analyzed that for exponential heating and non-uniform velocity conditions, the CPC fractional operator is the finest fractional model to describe the memory effect of velocity, energy and concentration profile. Moreover, the graphical representations of the analytical solutions illustrated the main results of the present work. Also, in the literature, it is observed that to derived analytical results from fractional fluid models developed by the various fractional operators, is difficult and this article contributing to answer the open problem of obtaining analytical solutions the fractionalized fluid models.
本文旨在采用一种新方法,研究磁流体动力学(MHD)作用下二级流体流动的热传输现象的精确解,该现象伴有指数加热以及达西定律。此现象已用偏微分方程表示,然后将控制方程转化为无量纲形式。为了更好地描述二级流体的流变学特性,通过应用常数比例 - 卡普托混合导数(CPC)、阿坦加纳 - 巴莱努在卡普托意义下(ABC)以及卡普托 - 法布里齐奥(CF)分数阶导数算子的新定义,建立了一个分数阶模型,该模型描述了广义记忆效应。为了求解速度、温度和浓度方程的米塔格 - 莱夫勒函数和G函数形式的精确解,应用了拉普拉斯积分变换技术。通过使用图形软件绘制各种图表,展示了各种系统参数对流体速度、浓度和温度分布的物理意义。此外,为了验证所获得的解,与一些已发表的工作进行了对比分析。还分析得出,对于指数加热和非均匀速度条件,CPC分数阶算子是描述速度、能量和浓度分布记忆效应的最佳分数阶模型。此外,解析解的图形表示说明了本工作的主要结果。而且,在文献中可以观察到,从由各种分数阶算子开发的分数阶流体模型中推导解析结果是困难的,而本文有助于解决分数阶流体模型获得解析解这一开放性问题。