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Finite element investigation of Dufour and Soret impacts on MHD rotating flow of Oldroyd-B nanofluid over a stretching sheet with double diffusion Cattaneo Christov heat flux model
Powder Technology ( IF 5.2 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.powtec.2020.09.008
Bagh Ali , Sajjad Hussain , Yufeng Nie , Ahmed Kadhim Hussein , Danial Habib

Abstract A description for magnetohydrodynamic effects on the transient rotational flow of Oldroyd-B nanofluids is considered. The temperature and concentration distributions are associated with Cattaneo-Christove double diffusion, Brownian motion, thermophoresis, Soret, and Dufour. The governing equations in the three-dimensional form are transmuted into dimensionless two-dimensional form with the implementation of suitable scaling transformations. The variational finite element procedure is harnessed and coded in Matlab script to obtain the numerical solution of the coupled non-linear partial differential problem. The varying patterns of velocities, skin friction coefficients, Nusselt number, Sherwood number, fluid temperature, and concentration functions are computed to reveal the physical nature of this study. It is observed that higher inputs of the parameters for magnetic force, Deborah number, rotational fluid, and cause to slow the primary as well as secondary velocities but they raise the temperature like thermophoresis and Brownian motion does. However, thermal relaxation parameter reduces the nanofluid temperature. The local heat transfer rate reduces against Nt, rotational, and Nb parameters, and it is higher for Prandtl number. The current FEM (finite element method) solutions have been approved widely with the recent published results, showing an excellent correlation. The examination has significant applications in the food industry and relevance to energy systems, biomedical, and modern technologies of aerospace systems.

中文翻译:

Dufour 和 Soret 对 Oldroyd-B 纳米流体在拉伸片上的 MHD 旋转流影响的有限元研究,采用双扩散 Cattaneo Christov 热通量模型

摘要 考虑了磁流体动力学对 Oldroyd-B 纳米流体瞬态旋转流动的影响。温度和浓度分布与 Cattaneo-Christove 双扩散、布朗运动、热泳、Soret 和 Dufour 相关。三维形式的控制方程转化为无量纲的二维形式,并进行适当的缩放变换。变分有限元程序在 Matlab 脚本中被利用和编码,以获得耦合非线性偏微分问题的数值解。计算速度、皮肤摩擦系数、努塞尔数、舍伍德数、流体温度和浓度函数的不同模式以揭示本研究的物理性质。据观察,磁力、德博拉数、旋转流体等参数的较高输入会导致初级和次级速度减慢,但它们会像热泳和布朗运动一样升高温度。然而,热弛豫参数降低了纳米流体温度。局部传热率相对于 Nt、旋转和 Nb 参数降低,而 Prandtl 数更高。当前的 FEM(有限元方法)解决方案已得到广泛认可,最近公布的结果显示出极好的相关性。该考试在食品工业中具有重要应用,并且与能源系统、生物医学和航空航天系统的现代技术相关。并导致初级和次级速度减慢,但它们会像热泳和布朗运动一样升高温度。然而,热弛豫参数降低了纳米流体温度。局部传热率相对于 Nt、旋转和 Nb 参数降低,而 Prandtl 数更高。当前的 FEM(有限元方法)解决方案已得到广泛认可,最近公布的结果显示出极好的相关性。该考试在食品工业中具有重要应用,并且与能源系统、生物医学和航空航天系统的现代技术相关。并导致初级和次级速度减慢,但它们会像热泳和布朗运动一样升高温度。然而,热弛豫参数降低了纳米流体温度。局部传热率相对于 Nt、旋转和 Nb 参数降低,而 Prandtl 数更高。当前的 FEM(有限元方法)解决方案已得到广泛认可,最近公布的结果显示出极好的相关性。该考试在食品工业中具有重要应用,并且与能源系统、生物医学和航空航天系统的现代技术相关。和 Nb 参数,Prandtl 数更高。当前的 FEM(有限元方法)解决方案已得到广泛认可,最近公布的结果显示出极好的相关性。该考试在食品工业中具有重要应用,并且与能源系统、生物医学和航空航天系统的现代技术相关。和 Nb 参数,Prandtl 数更高。当前的 FEM(有限元方法)解决方案已得到广泛认可,最近公布的结果显示出极好的相关性。该考试在食品工业中具有重要应用,并且与能源系统、生物医学和航空航天系统的现代技术相关。
更新日期:2021-01-01
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