Stagnation Point Flow Of A Second-Grade Hybrid Nanofluid Induced By A Riga Plate

Khashi’ie, Najiyah Safwa and Waini, Iskandar and Mohd Zokri, Syazwani and Mohd Kasim, Abdul Rahman and Md Arifin, Norihan and Pop, Ioan Mihai (2021) Stagnation Point Flow Of A Second-Grade Hybrid Nanofluid Induced By A Riga Plate. International Journal of Numerical Methods for Heat and Fluid Flow. pp. 1-19. ISSN 0961-5539

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Abstract

Purpose – This paper aims to accentuate the behavior of second-grade hybrid Al2O3–Cu nanofluid flow and its thermal characteristics driven by a stretching/shrinking Riga plate. Design/methodology/approach – The second-grade fluid is considered with the combination of Cu and Al2O3 nanoparticles. Three base fluids namely water, ethylene glycol (EG) and methanol with different Prandtl number are also examined. The formulation of the mathematical model of second-grade hybrid nanofluid complies with the boundary layer approximations. The complexity of the governing model is reduced into a simpler differential equations using the similarity transformation. The bvp4c solver is fully used to solve the reduced equations. The observation of multiple solutions is conducted for the assisting (stretching) and opposing (shrinking) cases. Findings – The impact of suction parameter, second-grade parameter, electromagnetohydrodynamics (EMHD) parameter, velocity ratio parameter and the volumetric concentration of the alumina and copper nanoparticles are numerically analyzed on the velocity and temperature profiles, skin friction coefficient and local Nusselt number (thermal rate) of the second-grade Al2O3–Cu/water. The solution is unique when (static and stretching cases) while dual for a specific range of negative in the presence of suction effect. Based on the appearance of the first solution in all cases of, it is physically showed that the first solution is stable. Further examination reveals that the EMHD and suction parameters are the contributing factors for the thermal enhancement of this non-Newtonian working fluid. Meanwhile, the viscosity of the non-Newtonian fluid also plays a significant role in the fluid motion and heat transfer rate based on the finding that the EG base fluid produces the maximum heat transfer rate but the lowest critical value and skin friction coefficient. Originality/value – The results are novel and contribute to the discovery of the hybrid nanoparticles’ performance in the non-Newtonian second-grade fluid. Besides, this study is beneficial to the researchers in this field and general audience from industries regarding the factors, which contributing to the thermal enhancement of the working fluid

Item Type:	Article
Uncontrolled Keywords:	Heat Transfer, Stagnation Point Flow, Hybrid Nanofluid, Riga Plate, Second-Grade
Divisions:	Faculty of Mechanical and Manufacturing Engineering Technology > Mechanical Engineering Technology
Depositing User:	Norfaradilla Idayu Ab. Ghafar
Date Deposited:	05 May 2022 15:27
Last Modified:	05 May 2022 15:27
URI:	http://eprints.utem.edu.my/id/eprint/25863
Statistic Details:	View Download Statistic

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