Hybrid Nanofluid Flow And Heat Transfer Past A Vertical Thin Needle With Prescribed Surface Heat Flux

Waini, Iskandar and Ishak, Anuar and Pop, Ioan Mihai (2019) Hybrid Nanofluid Flow And Heat Transfer Past A Vertical Thin Needle With Prescribed Surface Heat Flux. International Journal of Numerical Methods for Heat and Fluid Flow, 29 (12). pp. 4875-4894. ISSN 0961-5539

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Abstract

Purpose: The purpose of this paper is to study the steady mixed convection hybrid nanofluid flow and heat transfer past a vertical thin needle with prescribed surface heat flux. Design/methodology/approach: The governing partial differential equations are transformed into a set of ordinary differential equations by using a similarity transformation. The transformed equations are then solved numerically using the boundary value problem solver (bvp4c) in Matlab software. The features of the skin friction coefficient and the local Nusselt number as well as the velocity and temperature profiles for different values of the governing parameters are analyzed and discussed. Findings: It is found that dual solutions exist for a certain range of the mixed convection parameter where its critical values decrease with the increasing of the copper (Cu) nanoparticle volume fractions and for the smaller needle size. It is also observed that the increasing of the copper (Cu) nanoparticle volume fractions and the decreasing of the needle size tend to enhance the skin friction coefficient and the local Nusselt number on the needle surface. A temporal stability analysis is performed to determine the stability of the dual solutions in the long run, and it is revealed that only one of them is stable, while the other is unstable. Originality/value: The problem of hybrid nanofluid flow and heat transfer past a vertical thin needle with prescribed surface heat flux is the important originality of the present study where the dual solutions for the opposing flow are obtained.

Item Type:	Article
Uncontrolled Keywords:	Dual solutions, Hybrid nanofluid, Mixed convection, Prescribed heat flux, Stability analysis, Thin needle, Nanofluid Flow, Heat Transfer
Divisions:	Faculty of Mechanical and Manufacturing Engineering Technology
Depositing User:	Sabariah Ismail
Date Deposited:	22 Dec 2020 12:21
Last Modified:	22 Dec 2020 12:21
URI:	http://eprints.utem.edu.my/id/eprint/24325
Statistic Details:	View Download Statistic

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