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Effect of Buoyancy Force on The Flow and Heat Transfer Around a Thin Needle in Al2O3 – Cu Hybrid Nanofluid

CFD Letters
Volume 12, No. 1, January 2020, Pages 22-36

Siti Nur Alwani Salleh1,*, Norfifah Bachok1,2, Norihan Md Arifin1,2, Fadzilah Md Ali1,2

1 Institute for Mathematical Research, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
2 Department of Mathematics, Faculty of Science, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor, Malaysia
*Corresponding author: alwani24salleh@gmail.com

KEYWORDS

Thin needle; Buoyancy force; Hybrid nanofluid; Multiple solutions; Stability analysis

ABSTRACT

An analysis has been performed to study the effect of buoyancy force in the boundary layer flow past a thin needle in a hybrid nanofluid. In this study, we have taken into consideration a combination of two types of nanoparticles which are alumina and copper in the base fluid. The coupled nonlinear partial differential equations representing momentum and heat equations are reduced into a set of nonlinear ordinary differential equations. The transformed equations are evaluated numerically by adopting the bvp4c method with the help of MATLAB software. Effects of involved controlling physical parameters, namely buoyancy or mixed convection parameter, velocity ratio parameter, solid volume fraction parameters and needle thickness on the skin friction coefficient and heat transfer rate as well as velocity and temperature profiles are indicated through graphs and then discussed. It is revealed that the addition of every 0.2% alumina and copper nanoparticle (?_1 and ?_2) into a base fluid tends to enhance the heat transfer rate for about 18% up to 44%. It is worth knowing that the existence of dual branches of the solution is noted when the flow is opposing (?<0) and when the needle against the free stream direction (?<0).

CITE THIS ARTICLE

MLA
Siti Nur Alwani, Salleh, et al. “Effect of Buoyancy Force on The Flow and Heat Transfer Around a Thin Needle in Al2O3 – Cu Hybrid Nanofluid.” CFD Letters 12.1 (2020): 22-36.

APA
Siti Nur Alwani, S., Norfifah, B., Norihan, M. A. & Fadzilah, M. A.(2020). Effect of Buoyancy Force on The Flow and Heat Transfer Around a Thin Needle in Al2O3 – Cu Hybrid Nanofluid. CFD Letters, 12(1), 22-36.

Chicago
Siti Nur Alwani Salleh, Norfifah Bachok, Norihan Md Arifin and Fadzilah Md Ali.”Effect of Buoyancy Force on The Flow and Heat Transfer Around a Thin Needle in Al2O3 – Cu Hybrid Nanofluid.” CFD Letters. 12, no. 1 (2020): 22-36.

Harvard
Siti Nur Alwani, S., Norfifah, B., Norihan, M.A., and Fadzilah, M.A., 2020. Effect of Buoyancy Force on The Flow and Heat Transfer Around a Thin Needle in Al2O3 – Cu Hybrid Nanofluid. CFD Letters 12(1), pp. 22-36.

Vancouver
Siti Nur Alwani S, Norfifah B, Norihan MA, Fadzilah MA. Effect of Buoyancy Force on The Flow and Heat Transfer Around a Thin Needle in Al2O3 – Cu Hybrid Nanofluid. CFD Letters. 2020;12(1): 22-36.

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