Entropy analysis of Hall-effect-driven TiO2−CoFe2O4/ engine oil-based hybrid nanofluid flow between spinning porous disks with thermal convective boundaries
The applications of fluid dynamics and heat transfer between coaxial double-rotating disks are diverse and crucial across various engineering and scientific fields. This study is motivated by the growing need for efficient thermal management in advanced engineering applications, such as cooling syst...
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Elsevier
2025-07-01
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| Series: | JCIS Open |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666934X25000078 |
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| author | Sk Enamul Surender Ontela |
| author_facet | Sk Enamul Surender Ontela |
| author_sort | Sk Enamul |
| collection | DOAJ |
| description | The applications of fluid dynamics and heat transfer between coaxial double-rotating disks are diverse and crucial across various engineering and scientific fields. This study is motivated by the growing need for efficient thermal management in advanced engineering applications, such as cooling systems, energy storage, and magnetohydrodynamic technologies. The research focuses on the heat transfer characteristics and entropy analysis of the flow of a second-grade hybrid nanofluid between two spinning porous disks, incorporating the effects of Hall currents, viscous dissipation, and thermal convective boundaries. The hybrid nanofluid consists of titanium dioxide and cobalt ferrite nanoparticles suspended in engine oil. The governing equations are transformed into non-dimensional forms using a similarity transformation and solved with the semi-analytical homotopy analysis method. Results reveal the effects of parameters on velocity, temperature profiles, Nusselt number, skin friction, entropy generation, and the Bejan number graphically. Notably, the temperature profile improves with increases in the Brinkman number and the thermal Biot number of the lower disk. In contrast, skin friction decreases with higher titanium dioxide volume fraction, porosity parameter, and magnetic field parameter. The heat transfer rate increases with a higher nanoparticle shape factor and magnetic field parameter. These findings offer significant implications for optimizing the thermal performance of nanofluids, particularly in advanced cooling systems, thermal energy storage, and magnetohydrodynamic applications where enhanced heat transfer and efficient thermal management are critical. |
| format | Article |
| id | doaj-art-bf301daa78da438b9272da01f0f065d0 |
| institution | OA Journals |
| issn | 2666-934X |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | JCIS Open |
| spelling | doaj-art-bf301daa78da438b9272da01f0f065d02025-08-20T02:06:32ZengElsevierJCIS Open2666-934X2025-07-011810013410.1016/j.jciso.2025.100134Entropy analysis of Hall-effect-driven TiO2−CoFe2O4/ engine oil-based hybrid nanofluid flow between spinning porous disks with thermal convective boundariesSk Enamul0Surender Ontela1Department of Mathematics, National Institute of Technology Mizoram, Aizawl, 796012, IndiaDepartment of Mathematics, National Institute of Technology Kurukshetra, Haryana, 136119, India; Department of Mathematics, National Institute of Technology Mizoram, Aizawl, 796012, India; Corresponding author. Department of Mathematics, National Institute of Technology Mizoram, Aizawl, 796012, India.The applications of fluid dynamics and heat transfer between coaxial double-rotating disks are diverse and crucial across various engineering and scientific fields. This study is motivated by the growing need for efficient thermal management in advanced engineering applications, such as cooling systems, energy storage, and magnetohydrodynamic technologies. The research focuses on the heat transfer characteristics and entropy analysis of the flow of a second-grade hybrid nanofluid between two spinning porous disks, incorporating the effects of Hall currents, viscous dissipation, and thermal convective boundaries. The hybrid nanofluid consists of titanium dioxide and cobalt ferrite nanoparticles suspended in engine oil. The governing equations are transformed into non-dimensional forms using a similarity transformation and solved with the semi-analytical homotopy analysis method. Results reveal the effects of parameters on velocity, temperature profiles, Nusselt number, skin friction, entropy generation, and the Bejan number graphically. Notably, the temperature profile improves with increases in the Brinkman number and the thermal Biot number of the lower disk. In contrast, skin friction decreases with higher titanium dioxide volume fraction, porosity parameter, and magnetic field parameter. The heat transfer rate increases with a higher nanoparticle shape factor and magnetic field parameter. These findings offer significant implications for optimizing the thermal performance of nanofluids, particularly in advanced cooling systems, thermal energy storage, and magnetohydrodynamic applications where enhanced heat transfer and efficient thermal management are critical.http://www.sciencedirect.com/science/article/pii/S2666934X25000078Double rotating disksSecond-grade hybrid nanofluidVariable thermal conductivityEntropy generationMagnetohydrodynamicDarcy-forchheimer porous medium |
| spellingShingle | Sk Enamul Surender Ontela Entropy analysis of Hall-effect-driven TiO2−CoFe2O4/ engine oil-based hybrid nanofluid flow between spinning porous disks with thermal convective boundaries JCIS Open Double rotating disks Second-grade hybrid nanofluid Variable thermal conductivity Entropy generation Magnetohydrodynamic Darcy-forchheimer porous medium |
| title | Entropy analysis of Hall-effect-driven TiO2−CoFe2O4/ engine oil-based hybrid nanofluid flow between spinning porous disks with thermal convective boundaries |
| title_full | Entropy analysis of Hall-effect-driven TiO2−CoFe2O4/ engine oil-based hybrid nanofluid flow between spinning porous disks with thermal convective boundaries |
| title_fullStr | Entropy analysis of Hall-effect-driven TiO2−CoFe2O4/ engine oil-based hybrid nanofluid flow between spinning porous disks with thermal convective boundaries |
| title_full_unstemmed | Entropy analysis of Hall-effect-driven TiO2−CoFe2O4/ engine oil-based hybrid nanofluid flow between spinning porous disks with thermal convective boundaries |
| title_short | Entropy analysis of Hall-effect-driven TiO2−CoFe2O4/ engine oil-based hybrid nanofluid flow between spinning porous disks with thermal convective boundaries |
| title_sort | entropy analysis of hall effect driven tio2 cofe2o4 engine oil based hybrid nanofluid flow between spinning porous disks with thermal convective boundaries |
| topic | Double rotating disks Second-grade hybrid nanofluid Variable thermal conductivity Entropy generation Magnetohydrodynamic Darcy-forchheimer porous medium |
| url | http://www.sciencedirect.com/science/article/pii/S2666934X25000078 |
| work_keys_str_mv | AT skenamul entropyanalysisofhalleffectdriventio2cofe2o4engineoilbasedhybridnanofluidflowbetweenspinningporousdiskswiththermalconvectiveboundaries AT surenderontela entropyanalysisofhalleffectdriventio2cofe2o4engineoilbasedhybridnanofluidflowbetweenspinningporousdiskswiththermalconvectiveboundaries |