Numerical investigation of trihybrid nanofluid heat transfer in a cavity with a hot baffle
Trihybrid nanofluids, which combine the benefits of three distinct types of nanoparticles, have significant potential to enhance heat transfer in various thermal management applications. Understanding their behaviour in confined geometries with complex boundary conditions, such as a free surface and...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24016150 |
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| author | Rajab Alsayegh |
| author_facet | Rajab Alsayegh |
| author_sort | Rajab Alsayegh |
| collection | DOAJ |
| description | Trihybrid nanofluids, which combine the benefits of three distinct types of nanoparticles, have significant potential to enhance heat transfer in various thermal management applications. Understanding their behaviour in confined geometries with complex boundary conditions, such as a free surface and heated obstacle, is important to optimize their performance. This study investigates the heat transfer characteristics of a Cu-Al2O3-MWCNT-oil trihybrid nanofluid within a square cavity featuring a hot baffle and a free surface. Using numerical simulations and Patankar's blocked-off region method, a parametric study was conducted, varying the Rayleigh number (5000–50,000), nanoparticle volume fraction Φ (0–0.06), obstacle size and aspect ratio (h:w from 0.7 to 9), and Marangoni number (−10,000 to 10,000). The results reveal that negative Marangoni (Ma) numbers enhance convective heat transfer due to the synergistic interaction between the thermocapillary and buoyancy forces. Conversely, positive Marangoni numbers hinder heat transfer owing to competition between these forces. With increasing Rayleigh number (Ra), heat transfer enhancements of up to 45 %, 18 % with nanoparticle addition, and 22 % with varying obstacle sizes were observed. Therefore, these parameters can be varied to optimize the thermal design. |
| format | Article |
| id | doaj-art-b9e98211c749417aa0459cafd17de141 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-b9e98211c749417aa0459cafd17de1412025-01-08T04:52:34ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105584Numerical investigation of trihybrid nanofluid heat transfer in a cavity with a hot baffleRajab Alsayegh0Department of Mechanical Engineering, Faculty of Engineering, King Abdulaziz University, P.O.Box 80200, 21589, Jeddah, Saudi ArabiaTrihybrid nanofluids, which combine the benefits of three distinct types of nanoparticles, have significant potential to enhance heat transfer in various thermal management applications. Understanding their behaviour in confined geometries with complex boundary conditions, such as a free surface and heated obstacle, is important to optimize their performance. This study investigates the heat transfer characteristics of a Cu-Al2O3-MWCNT-oil trihybrid nanofluid within a square cavity featuring a hot baffle and a free surface. Using numerical simulations and Patankar's blocked-off region method, a parametric study was conducted, varying the Rayleigh number (5000–50,000), nanoparticle volume fraction Φ (0–0.06), obstacle size and aspect ratio (h:w from 0.7 to 9), and Marangoni number (−10,000 to 10,000). The results reveal that negative Marangoni (Ma) numbers enhance convective heat transfer due to the synergistic interaction between the thermocapillary and buoyancy forces. Conversely, positive Marangoni numbers hinder heat transfer owing to competition between these forces. With increasing Rayleigh number (Ra), heat transfer enhancements of up to 45 %, 18 % with nanoparticle addition, and 22 % with varying obstacle sizes were observed. Therefore, these parameters can be varied to optimize the thermal design.http://www.sciencedirect.com/science/article/pii/S2214157X24016150Trihybrid nanofluidHeat transferMarangoni convectionCavity flowHot baffleNumerical simulation |
| spellingShingle | Rajab Alsayegh Numerical investigation of trihybrid nanofluid heat transfer in a cavity with a hot baffle Case Studies in Thermal Engineering Trihybrid nanofluid Heat transfer Marangoni convection Cavity flow Hot baffle Numerical simulation |
| title | Numerical investigation of trihybrid nanofluid heat transfer in a cavity with a hot baffle |
| title_full | Numerical investigation of trihybrid nanofluid heat transfer in a cavity with a hot baffle |
| title_fullStr | Numerical investigation of trihybrid nanofluid heat transfer in a cavity with a hot baffle |
| title_full_unstemmed | Numerical investigation of trihybrid nanofluid heat transfer in a cavity with a hot baffle |
| title_short | Numerical investigation of trihybrid nanofluid heat transfer in a cavity with a hot baffle |
| title_sort | numerical investigation of trihybrid nanofluid heat transfer in a cavity with a hot baffle |
| topic | Trihybrid nanofluid Heat transfer Marangoni convection Cavity flow Hot baffle Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24016150 |
| work_keys_str_mv | AT rajabalsayegh numericalinvestigationoftrihybridnanofluidheattransferinacavitywithahotbaffle |