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广义二阶流体的传热问题,考虑了磁电流体力学、辐射和指数加热,使用了 Caputo-Fabrizio 分数导数方法。

Heat transfer of generalized second grade fluid with MHD, radiation and exponential heating using Caputo-Fabrizio fractional derivatives approach.

机构信息

Shaheed Benazir Bhutto Women University Peshawar, Peshawar, 25000, Khyber Pakhtunkhwa, Pakistan.

Department of Mathematics, Islamia College Peshawar, Peshawar, 25000, Khyber Pakhtunkhwa, Pakistan.

出版信息

Sci Rep. 2023 Mar 30;13(1):5220. doi: 10.1038/s41598-022-22665-4.

Abstract

The aim of the present work is to apply the Caputo-Fabrizio fractional derivative to the heat transformation of unsteady incompressible second grade fluid. The effects of magneto hydro dynamic and radiation are analyzed. In governing equation of heat transfer nonlinear radiative heat is examined. Exponential heating phenomena is considered at boundary. Firstly, the dimensional governing equations with the initial & boundary conditions are converted into non-dimensional form. Exact analytical solutions are obtained for dimensionless fractional governing equations which consist of momentum and energy equations by using Laplace transform method. Special cases are investigated of the obtained solutions and it is noticed that some well-known results are achieved published in literature from these special cases. At the end, for graphical illustration the influences of different physical parameters like radiation, Prandtl, fractional parameter, Grashof numbers and Magneto hydro dynamic are checked graphically.

摘要

本工作旨在将 Caputo-Fabrizio 分数导数应用于非定常不可压缩二级流体的热变换。分析了磁流体动力学和辐射的影响。在传热控制方程中,考虑了非线性辐射热。边界处考虑了指数加热现象。首先,将具有初始和边界条件的量纲控制方程转换为无量纲形式。通过拉普拉斯变换法,对包含动量和能量方程的无量纲分数控制方程获得了精确的解析解。对所得解进行了特殊情况的研究,并注意到从这些特殊情况可以得到一些已发表在文献中的著名结果。最后,为了图形说明,通过图形检查了不同物理参数(如辐射、普朗特数、分数参数、格拉肖夫数和磁流体动力学)的影响。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b1ef/10063610/de9d0761590a/41598_2022_22665_Fig1_HTML.jpg

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