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Unsteady stagnation point flow past a permeable stretching/ shrinking Riga plate in Al2O3-Cu/H2O hybrid nanofluid with thermal radiation

Purpose – The investigation of fluid flow and heat transfer is incredibly significant in the present era, particularly in the engineering and manufacturing industries. Hence, this study aims to concern with analysing the unsteady stagnation point flow towards a permeable stretching/shrinking Riga pl...

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Main Authors: Zainal, Nurul Amira, Nazar, Roslinda, Naganthran, Kohilavani, Pop, Ioan
Format: Article
Language:English
Published: Emerald Group Holdings Ltd. 2022
Online Access:http://eprints.utem.edu.my/id/eprint/26731/2/10-1108-HFF-08-2021-0569.PDF
http://eprints.utem.edu.my/id/eprint/26731/
https://www.emerald.com/insight/content/doi/10.1108/HFF-08-2021-0569/full/pdf?title=unsteady-stagnation-point-flow-past-a-permeable-stretchingshrinking-riga-plate-in-alsub2subosub3sub-cuhsub2subo-hybrid-nanofluid-with-thermal-radiation
https://doi.org/10.1108/HFF-08-2021-0569
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spelling my.utem.eprints.267312023-04-14T14:14:47Z http://eprints.utem.edu.my/id/eprint/26731/ Unsteady stagnation point flow past a permeable stretching/ shrinking Riga plate in Al2O3-Cu/H2O hybrid nanofluid with thermal radiation Zainal, Nurul Amira Nazar, Roslinda Naganthran, Kohilavani Pop, Ioan Purpose – The investigation of fluid flow and heat transfer is incredibly significant in the present era, particularly in the engineering and manufacturing industries. Hence, this study aims to concern with analysing the unsteady stagnation point flow towards a permeable stretching/shrinking Riga plate of Al2O3- Cu/H2O. The effect of thermal radiation on the boundary layer flow is also taken into account. Design/methodology/approach – The multi-variable differential equations with partial derivatives are transformed into third-order and second-order differential equations by applying appropriate transformations. The reduced mathematical model is solved in the MATLAB system by using the bvp4c procedure. This solution approach is capable of producing multiple solutions once the necessary assumptions are provided. Findings – The results of various control parameters were analysed, and it has been observed that raising the solution viscosity from 0% to 0.5% and 1% improves the coefficient of skin friction and thermal conductivity by almost 1.0% and 1.9%. Similar response and observation can be witnessed in the addition of modified Hartmann number where the highest values dominate about 10.7% improvement. There is a substantial enhancement in the heat transfer rate, approximately 1.8% when the unsteadiness parameter leads around 30% in the boundary layer flow. In contrast, the increment in thermal radiation promotes heat transfer deterioration. Further, more than one solution is proven, which invariably leads to a stability analysis, which validates the first solution’s feasibility. Originality/value – The present results are new and original for the study of flow and heat transfer on unsteady stagnation point flow past a permeable stretching/shrinking Riga plate in Al2O3-Cu/H2O hybrid nanofluid with thermal radiation Emerald Group Holdings Ltd. 2022-06 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/26731/2/10-1108-HFF-08-2021-0569.PDF Zainal, Nurul Amira and Nazar, Roslinda and Naganthran, Kohilavani and Pop, Ioan (2022) Unsteady stagnation point flow past a permeable stretching/ shrinking Riga plate in Al2O3-Cu/H2O hybrid nanofluid with thermal radiation. International Journal of Numerical Methods for Heat & Fluid Flow, 32 (8). pp. 2640-2658. ISSN 0961-5539 https://www.emerald.com/insight/content/doi/10.1108/HFF-08-2021-0569/full/pdf?title=unsteady-stagnation-point-flow-past-a-permeable-stretchingshrinking-riga-plate-in-alsub2subosub3sub-cuhsub2subo-hybrid-nanofluid-with-thermal-radiation https://doi.org/10.1108/HFF-08-2021-0569
institution Universiti Teknikal Malaysia Melaka
building UTEM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknikal Malaysia Melaka
content_source UTEM Institutional Repository
url_provider http://eprints.utem.edu.my/
language English
description Purpose – The investigation of fluid flow and heat transfer is incredibly significant in the present era, particularly in the engineering and manufacturing industries. Hence, this study aims to concern with analysing the unsteady stagnation point flow towards a permeable stretching/shrinking Riga plate of Al2O3- Cu/H2O. The effect of thermal radiation on the boundary layer flow is also taken into account. Design/methodology/approach – The multi-variable differential equations with partial derivatives are transformed into third-order and second-order differential equations by applying appropriate transformations. The reduced mathematical model is solved in the MATLAB system by using the bvp4c procedure. This solution approach is capable of producing multiple solutions once the necessary assumptions are provided. Findings – The results of various control parameters were analysed, and it has been observed that raising the solution viscosity from 0% to 0.5% and 1% improves the coefficient of skin friction and thermal conductivity by almost 1.0% and 1.9%. Similar response and observation can be witnessed in the addition of modified Hartmann number where the highest values dominate about 10.7% improvement. There is a substantial enhancement in the heat transfer rate, approximately 1.8% when the unsteadiness parameter leads around 30% in the boundary layer flow. In contrast, the increment in thermal radiation promotes heat transfer deterioration. Further, more than one solution is proven, which invariably leads to a stability analysis, which validates the first solution’s feasibility. Originality/value – The present results are new and original for the study of flow and heat transfer on unsteady stagnation point flow past a permeable stretching/shrinking Riga plate in Al2O3-Cu/H2O hybrid nanofluid with thermal radiation
format Article
author Zainal, Nurul Amira
Nazar, Roslinda
Naganthran, Kohilavani
Pop, Ioan
spellingShingle Zainal, Nurul Amira
Nazar, Roslinda
Naganthran, Kohilavani
Pop, Ioan
Unsteady stagnation point flow past a permeable stretching/ shrinking Riga plate in Al2O3-Cu/H2O hybrid nanofluid with thermal radiation
author_facet Zainal, Nurul Amira
Nazar, Roslinda
Naganthran, Kohilavani
Pop, Ioan
author_sort Zainal, Nurul Amira
title Unsteady stagnation point flow past a permeable stretching/ shrinking Riga plate in Al2O3-Cu/H2O hybrid nanofluid with thermal radiation
title_short Unsteady stagnation point flow past a permeable stretching/ shrinking Riga plate in Al2O3-Cu/H2O hybrid nanofluid with thermal radiation
title_full Unsteady stagnation point flow past a permeable stretching/ shrinking Riga plate in Al2O3-Cu/H2O hybrid nanofluid with thermal radiation
title_fullStr Unsteady stagnation point flow past a permeable stretching/ shrinking Riga plate in Al2O3-Cu/H2O hybrid nanofluid with thermal radiation
title_full_unstemmed Unsteady stagnation point flow past a permeable stretching/ shrinking Riga plate in Al2O3-Cu/H2O hybrid nanofluid with thermal radiation
title_sort unsteady stagnation point flow past a permeable stretching/ shrinking riga plate in al2o3-cu/h2o hybrid nanofluid with thermal radiation
publisher Emerald Group Holdings Ltd.
publishDate 2022
url http://eprints.utem.edu.my/id/eprint/26731/2/10-1108-HFF-08-2021-0569.PDF
http://eprints.utem.edu.my/id/eprint/26731/
https://www.emerald.com/insight/content/doi/10.1108/HFF-08-2021-0569/full/pdf?title=unsteady-stagnation-point-flow-past-a-permeable-stretchingshrinking-riga-plate-in-alsub2subosub3sub-cuhsub2subo-hybrid-nanofluid-with-thermal-radiation
https://doi.org/10.1108/HFF-08-2021-0569
_version_ 1763300018044796928
score 13.211869

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