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<p>This paper investigates the combined effects of Hall current and thermal diffusion on the unsteady magnetohydrodynamic (MHD) free convective rotating flow of nanofluids within a porous medium. The study considers flow past a moving vertical semi-infinite flat plate under the influence of a heat source and a chemical reaction. Two types of nanofluids, namely copper (Cu) and titanium dioxide (TiO₂), are utilized to evaluate the variations in flow behavior. The governing equations, accounting for momentum, energy, and concentration, are analytically solved using the perturbation approximation technique. The analysis explores the influence of key dimensionless parameters, including Hall current, ion Soret effect, rotational effects, suction, heat source intensity, and thermal radiation, on the velocity, temperature, and concentration profiles. The findings reveal that the velocity of the nanofluid increases significantly with higher Hall current and Soret parameters, whereas it diminishes with an increase in rotational and suction parameters due to the opposing forces introduced in the system. Furthermore, the temperature profile shows a notable enhancement with increasing heat source strength and thermal radiation parameters, indicating their critical role in energy transfer within the medium. The results are illustrated through a combination of graphical and tabular data, providing insights into the complex interplay of physical parameters governing nanofluid behavior. These findings contribute to a better understanding of MHD flows in porous media, with potential applications in industrial processes, energy systems, and nanotechnology.</p>

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Effects of hall current and thermal diffusion on unsteady MHD rotating flow of water based Cu, and TiO2 nanofluid in the presence of thermal radiation and chemical reaction

  • 期刊论文

  • 发表日期：

    2025年2月3日

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  • V. Raghavendra Prasad,
  • Nadimpalli Udaya Bhaskara Varma,
  • Jamuna bodduna,
  • Moganti Satya Suresh,
  • Sudhakaru Komera,
  • Raghunath Kodi

摘要

This paper investigates the combined effects of Hall current and thermal diffusion on the unsteady magnetohydrodynamic (MHD) free convective rotating flow of nanofluids within a porous medium. The study considers flow past a moving vertical semi-infinite flat plate under the influence of a heat source and a chemical reaction. Two types of nanofluids, namely copper (Cu) and titanium dioxide (TiO₂), are utilized to evaluate the variations in flow behavior. The governing equations, accounting for momentum, energy, and concentration, are analytically solved using the perturbation approximation technique. The analysis explores the influence of key dimensionless parameters, including Hall current, ion Soret effect, rotational effects, suction, heat source intensity, and thermal radiation, on the velocity, temperature, and concentration profiles. The findings reveal that the velocity of the nanofluid increases significantly with higher Hall current and Soret parameters, whereas it diminishes with an increase in rotational and suction parameters due to the opposing forces introduced in the system. Furthermore, the temperature profile shows a notable enhancement with increasing heat source strength and thermal radiation parameters, indicating their critical role in energy transfer within the medium. The results are illustrated through a combination of graphical and tabular data, providing insights into the complex interplay of physical parameters governing nanofluid behavior. These findings contribute to a better understanding of MHD flows in porous media, with potential applications in industrial processes, energy systems, and nanotechnology.