Non-Fourier heat and mass transport enhancement by hybrid nanofluid-flow over a non-linearly stretchable surface having variable thickness

IF 6 2区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY
Sayer Obaid Alharbi , Rai Sajjad Saif , Maryam Haneef , Muhammad Nawaz , Taseer Muhammad
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引用次数: 0

Abstract

This article uses non-classical Fick's law, non-Fourier's law, and conservation laws for mass and thermal transport. The hybrid nanoparticles Cu and Al2O3 are considered. The new correlations among the thermo-physical properties of base fluid, Cu and Al2O3 are coupled with simplified nonlinear mathematical models. The resulting models are solved numerically by the finite element method (FEM). The linear shape functions are chosen for the approximation of residual equations. This approximation leads to a nonlinear algebraic system that is linearized by the Picard scheme. The numerical results are ensured to be grid-independent, and convergence is analyzed. The results are validated, and an excellent agreement is obtained between available benchmarks and current outcomes. Thermal solutal relaxation phenomena are responsible for a significant reduction in the transport of heat and mass in Newtonian fluids. These non-Fourier's and non-classical Fick's laws are capable of capturing thermal and solutal elastic phenomena, respectively. Cu and Al2O3 simultaneously act as good conductors of heat, and their simultaneous dispersion in base fluid results in a significant rise in thermal conductivity. Numerical experiments have shown that the transport of heat can be optimized by simultaneous suspension of Cu and Al2O3.

厚度可变的非线性拉伸表面上的混合纳米流体流对非傅里叶热量和质量传输的增强作用
本文采用非经典菲克定律、非傅里叶定律以及质量和热传输守恒定律。文章考虑了混合纳米粒子 Cu 和 Al2O3。基础流体、Cu 和 Al2O3 的热物理性质之间的新关联与简化的非线性数学模型相结合。所得模型采用有限元法(FEM)进行数值求解。选择线性形状函数作为残差方程的近似值。这种近似导致一个非线性代数系统,该系统通过 Picard 方案线性化。确保数值结果与网格无关,并对收敛性进行了分析。结果得到了验证,现有基准与当前结果非常吻合。热溶质弛豫现象是牛顿流体中热量和质量传输显著减少的原因。这些非傅里叶定律和非经典菲克定律能够分别捕捉热和溶质弹性现象。铜和 Al2O3 同时是热的良导体,它们同时分散在基质流体中会导致热导率显著上升。数值实验表明,同时悬浮 Cu 和 Al2O3 可以优化热量的传输。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ain Shams Engineering Journal
Ain Shams Engineering Journal Engineering-General Engineering
CiteScore
10.80
自引率
13.30%
发文量
441
审稿时长
49 weeks
期刊介绍: in Shams Engineering Journal is an international journal devoted to publication of peer reviewed original high-quality research papers and review papers in both traditional topics and those of emerging science and technology. Areas of both theoretical and fundamental interest as well as those concerning industrial applications, emerging instrumental techniques and those which have some practical application to an aspect of human endeavor, such as the preservation of the environment, health, waste disposal are welcome. The overall focus is on original and rigorous scientific research results which have generic significance. Ain Shams Engineering Journal focuses upon aspects of mechanical engineering, electrical engineering, civil engineering, chemical engineering, petroleum engineering, environmental engineering, architectural and urban planning engineering. Papers in which knowledge from other disciplines is integrated with engineering are especially welcome like nanotechnology, material sciences, and computational methods as well as applied basic sciences: engineering mathematics, physics and chemistry.
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