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Mixed convective stagnation point flow of a hybrid nanofluid toward a vertical cylinder

Purpose : The purpose of this paper is to numerically analyze the stagnation point flow of Cu-Al2O3/water hybrid nanofluid with mixed convection past a flat plate and circular cylinder. Design/methodology/approach : The similarity equations that reduced from the boundary layer and energy equations...

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Main Authors: Khashi'ie, Najiyah Safwa, M. Arifin, Norihan, Merkin, John H., Yahaya, Rusya Iryanti, Pop, Ioan
Format: Article
Published: Emerald Publishing Limited 2021
Online Access:http://psasir.upm.edu.my/id/eprint/94211/
https://www.emerald.com/insight/content/doi/10.1108/HFF-11-2020-0725/full/html
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spelling my.upm.eprints.942112023-05-18T08:18:01Z http://psasir.upm.edu.my/id/eprint/94211/ Mixed convective stagnation point flow of a hybrid nanofluid toward a vertical cylinder Khashi'ie, Najiyah Safwa M. Arifin, Norihan Merkin, John H. Yahaya, Rusya Iryanti Pop, Ioan Purpose : The purpose of this paper is to numerically analyze the stagnation point flow of Cu-Al2O3/water hybrid nanofluid with mixed convection past a flat plate and circular cylinder. Design/methodology/approach : The similarity equations that reduced from the boundary layer and energy equations are solved using the bvp4c solver. The duality of solutions is observed within the specific range of the control parameters, namely, mixed convection parameter λ, curvature parameter γ and nanoparticles volumetric concentration ϕ1 for alumina, while for copper ϕ2. The stability analysis is also designed to justify the particular solutions’ stability. Additionally, the idea to obtain the solution for large value of λ and γ is also presented in this paper. Findings : Two solutions exist in opposing and assisting flows up to a critical value λc where λc lies in the opposing region. An upsurge of the curvature parameter tends to extend the critical value (delay the separation process), whilst increase the heat transfer performance of the working fluid. Meanwhile, the application of hybrid Cu-Al2O3/water nanofluid also can decelerate the separation of laminar boundary layer flow and produce higher heat transfer rate than the Cu–water nanofluid and pure water. Originality/value : The results are new and original. This study benefits to the other researchers, specifically in the observation of the fluid flow characteristics and heat transfer rate of the hybrid nanofluid. Also, this paper features with the mathematical formulation for the solution with large values of λ and γ. Emerald Publishing Limited 2021-03-19 Article PeerReviewed Khashi'ie, Najiyah Safwa and M. Arifin, Norihan and Merkin, John H. and Yahaya, Rusya Iryanti and Pop, Ioan (2021) Mixed convective stagnation point flow of a hybrid nanofluid toward a vertical cylinder. International Journal of Numerical Methods for Heat & Fluid Flow, 31 (12). pp. 3689-3710. ISSN 0961-5539 https://www.emerald.com/insight/content/doi/10.1108/HFF-11-2020-0725/full/html 10.1108/HFF-11-2020-0725
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
description Purpose : The purpose of this paper is to numerically analyze the stagnation point flow of Cu-Al2O3/water hybrid nanofluid with mixed convection past a flat plate and circular cylinder. Design/methodology/approach : The similarity equations that reduced from the boundary layer and energy equations are solved using the bvp4c solver. The duality of solutions is observed within the specific range of the control parameters, namely, mixed convection parameter λ, curvature parameter γ and nanoparticles volumetric concentration ϕ1 for alumina, while for copper ϕ2. The stability analysis is also designed to justify the particular solutions’ stability. Additionally, the idea to obtain the solution for large value of λ and γ is also presented in this paper. Findings : Two solutions exist in opposing and assisting flows up to a critical value λc where λc lies in the opposing region. An upsurge of the curvature parameter tends to extend the critical value (delay the separation process), whilst increase the heat transfer performance of the working fluid. Meanwhile, the application of hybrid Cu-Al2O3/water nanofluid also can decelerate the separation of laminar boundary layer flow and produce higher heat transfer rate than the Cu–water nanofluid and pure water. Originality/value : The results are new and original. This study benefits to the other researchers, specifically in the observation of the fluid flow characteristics and heat transfer rate of the hybrid nanofluid. Also, this paper features with the mathematical formulation for the solution with large values of λ and γ.
format Article
author Khashi'ie, Najiyah Safwa
M. Arifin, Norihan
Merkin, John H.
Yahaya, Rusya Iryanti
Pop, Ioan
spellingShingle Khashi'ie, Najiyah Safwa
M. Arifin, Norihan
Merkin, John H.
Yahaya, Rusya Iryanti
Pop, Ioan
Mixed convective stagnation point flow of a hybrid nanofluid toward a vertical cylinder
author_facet Khashi'ie, Najiyah Safwa
M. Arifin, Norihan
Merkin, John H.
Yahaya, Rusya Iryanti
Pop, Ioan
author_sort Khashi'ie, Najiyah Safwa
title Mixed convective stagnation point flow of a hybrid nanofluid toward a vertical cylinder
title_short Mixed convective stagnation point flow of a hybrid nanofluid toward a vertical cylinder
title_full Mixed convective stagnation point flow of a hybrid nanofluid toward a vertical cylinder
title_fullStr Mixed convective stagnation point flow of a hybrid nanofluid toward a vertical cylinder
title_full_unstemmed Mixed convective stagnation point flow of a hybrid nanofluid toward a vertical cylinder
title_sort mixed convective stagnation point flow of a hybrid nanofluid toward a vertical cylinder
publisher Emerald Publishing Limited
publishDate 2021
url http://psasir.upm.edu.my/id/eprint/94211/
https://www.emerald.com/insight/content/doi/10.1108/HFF-11-2020-0725/full/html
_version_ 1768009387875500032
score 13.211869

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