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<p>In this analysis, a computational study has been conducted to scrutinize the hydrothermal fallouts of buoyancy-driven magnetized Al<sub>2</sub>O<sub>3</sub>/water–ethylene glycol (50:50) nanofluid flow passing through an octagonal chamber containing circular-shaped heated blocks. The chamber walls are maintained at a lower temperature, while the inner blocks are heated. Water and ethylene glycol (50:50) are utilized as the base fluid, with alumina nanoparticles dispersed to enhance thermal performance. Suitable similarity transformations are employed to convert the governing dimensional equations into non-dimensional profiles, which are then numerically, solved using the Galerkin-based finite element method. The streamlines, velocity components, isotherms, and Nusselt number plots are analyzed concerning key flow-controlling parameters. The results indicate that heat transfer efficiency improves with an increasing volume fraction of nanoparticles. Additionally, the local Nusselt number exhibits enhancement with a rise in the Reynolds number. The study highlights the potential applications of nanofluids in various thermal management systems, including cooling in electronic devices, heat exchangers, biomedical applications such as targeted drug delivery and hyperthermia treatment, and industrial processes requiring efficient thermal transport. Their superior heat transfer capabilities and tunable thermophysical properties make hybrid nanofluids a promising choice for energy-efficient systems, particularly in aerospace, automotive cooling, and renewable energy sectors.</p>

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Computational analysis of MHD natural convection flow of Al2O3/water–ethylene glycol (50:50) hybrid nanofluid in an octagonal chamber with circular heated blocks

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Shan Ali Khan,
  • Muhammad Imran,
  • Umar Farooq,
  • Nahid Fatima,
  • Ali J. Chamkha,
  • Ghulam Rasool

摘要

In this analysis, a computational study has been conducted to scrutinize the hydrothermal fallouts of buoyancy-driven magnetized Al2O3/water–ethylene glycol (50:50) nanofluid flow passing through an octagonal chamber containing circular-shaped heated blocks. The chamber walls are maintained at a lower temperature, while the inner blocks are heated. Water and ethylene glycol (50:50) are utilized as the base fluid, with alumina nanoparticles dispersed to enhance thermal performance. Suitable similarity transformations are employed to convert the governing dimensional equations into non-dimensional profiles, which are then numerically, solved using the Galerkin-based finite element method. The streamlines, velocity components, isotherms, and Nusselt number plots are analyzed concerning key flow-controlling parameters. The results indicate that heat transfer efficiency improves with an increasing volume fraction of nanoparticles. Additionally, the local Nusselt number exhibits enhancement with a rise in the Reynolds number. The study highlights the potential applications of nanofluids in various thermal management systems, including cooling in electronic devices, heat exchangers, biomedical applications such as targeted drug delivery and hyperthermia treatment, and industrial processes requiring efficient thermal transport. Their superior heat transfer capabilities and tunable thermophysical properties make hybrid nanofluids a promising choice for energy-efficient systems, particularly in aerospace, automotive cooling, and renewable energy sectors.