Numerical analysis of hybrid nanofluid natural convection in a wavy walled porous enclosure: Local thermal non-equilibrium model
Article
Article Title | Numerical analysis of hybrid nanofluid natural convection in a wavy walled porous enclosure: Local thermal non-equilibrium model |
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Article Category | Article |
Authors | Kadhim, Hakim T., Al-Manea, Ahmed, Al-Shamani, Ali Najah and Yusaf, Talal |
Journal Title | International Journal of Thermofluids |
Journal Citation | 15, pp. 1-10 |
Article Number | 100190 |
Number of Pages | 10 |
Year | 2022 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 2666-2027 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.ijft.2022.100190 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S2666202722000544 |
Abstract | A numerical study of the Buoyancy-driven flow in a porous enclosure, having a bottom heated wavy wall, filled with Cu-Al2O3/water hybrid nanofluid is performed using the local thermal non-equilibrium model. The non-dimensional governing equations of fluid flow and heat transfer are solved using the Galerkin finite element method. The state variables change in the porous enclosure is represented using the Darcy-Brinkman model. The impacts of various effective parameters which include nanoparticle volume fraction (0 ≤ Φ ≤ 0.04), Darcy number (10−5 ≤ Da ≤ 10−2), modified conductivity ratio (0.1 ≤ γ ≤ 1000), the number of undulations (1≤ N ≤ 5) and the amplitude of waviness (0.05 ≤ A ≤ 2). The results showed that the Darcy number is the first controlling parameter on the fluid flow and temperature distributions followed by A, N and γ. Additionally, the heat transfer rate is increased by increasing the thermal conductivity of the nanoparticles reaching its maximum value at Φ = 0.04. Furthermore, by comparing the temperature fields of the fluid phase and solid matrix, it is clear that the effects of the local thermal non-equilibrium are significant at a low modified thermal conductivity ratio and high Darcy number. |
Keywords | Hybrid nanofluid; Local thermal non-equilibrium; Natural convection; Wavy porous enclosure |
ANZSRC Field of Research 2020 | 401703. Energy generation, conversion and storage (excl. chemical and electrical) |
Funder | Al-Furat Al-Awsat Technical University |
Byline Affiliations | Al-Furat Al-Awsat Technical University, Iraq |
Central Queensland University |
https://research.usq.edu.au/item/wz8zy/numerical-analysis-of-hybrid-nanofluid-natural-convection-in-a-wavy-walled-porous-enclosure-local-thermal-non-equilibrium-model
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