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<p>Hybrid nanofluids have emerged as a key player in a myriad of thermal engineering applications, from cooling technologies in rotating cylinders to energy harvesting devices and advanced heat exchangers. Realising the vast potential of such nanofluids, the present research targets heat transport analysis of mixed convection hydromagnetic radiative flow of ferro-hybrid nanofluid along an inclined stretching cylinder with heat generation and variable properties. This study integrates the effects of nonlinear radiation, volumetric heat sources, and an inclined magnetic field on the flow characteristics and energy transfer behaviour of an ethylene glycol-based hybrid nanofluid containing Fe<sub>3</sub>O<sub>4</sub>–COFe<sub>2</sub>O<sub>4</sub> nanoparticles. For improved suction process and maximised rate of heat transfer, the surface of the cylinder is made permeable so that fluid entry at the stagnation point is facilitated. The convective thermal boundary conditions are considered to ensure a realistic heat exchange scenario, making the study relevant for energy-efficient heat exchanger design, magnetic drug targeting systems, and industrial cooling devices. The nonlinear equations that are transformed, derived from the governing thermal field and flow equations, are solved numerically by the application of Runge–Kutta technique along with a boundary value conversion method incorporated in an iterative solution scheme. A graphical interpretation of the findings highlights the profound influence of thermal radiation, heat generation, and physical attributes like variable thermal conductivity, viscosity, and cylinder curvature on temperature enhancement. Furthermore, it was established that the mixed convection parameter fortifies the fluid’s momentum, while the heat source parameter bolsters both velocity and temperature fields. A comprehensive validation exercise demonstrates a close match with existing benchmark solutions in limiting cases, affirming the reliability of the current computational model. The findings hold promising implications for applications in thermal energy storage, magnetic field-assisted heat transfer, and process intensification in magnetohydrodynamic devices.</p>

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Mixed convective hydromagnetic radiative flow of ferro-hybrid nanofluid over an inclined elongating cylinder with heat generation and variable properties: heat transfer analysis

  • 期刊论文

  • 发表日期：

    2025年9月4日

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  • Shiva Shankar Cherala,
  • Nagaraju Gajjela,
  • G. Swamy Reddy,
  • Thirupathi Thumma

摘要

Hybrid nanofluids have emerged as a key player in a myriad of thermal engineering applications, from cooling technologies in rotating cylinders to energy harvesting devices and advanced heat exchangers. Realising the vast potential of such nanofluids, the present research targets heat transport analysis of mixed convection hydromagnetic radiative flow of ferro-hybrid nanofluid along an inclined stretching cylinder with heat generation and variable properties. This study integrates the effects of nonlinear radiation, volumetric heat sources, and an inclined magnetic field on the flow characteristics and energy transfer behaviour of an ethylene glycol-based hybrid nanofluid containing Fe3O4–COFe2O4 nanoparticles. For improved suction process and maximised rate of heat transfer, the surface of the cylinder is made permeable so that fluid entry at the stagnation point is facilitated. The convective thermal boundary conditions are considered to ensure a realistic heat exchange scenario, making the study relevant for energy-efficient heat exchanger design, magnetic drug targeting systems, and industrial cooling devices. The nonlinear equations that are transformed, derived from the governing thermal field and flow equations, are solved numerically by the application of Runge–Kutta technique along with a boundary value conversion method incorporated in an iterative solution scheme. A graphical interpretation of the findings highlights the profound influence of thermal radiation, heat generation, and physical attributes like variable thermal conductivity, viscosity, and cylinder curvature on temperature enhancement. Furthermore, it was established that the mixed convection parameter fortifies the fluid’s momentum, while the heat source parameter bolsters both velocity and temperature fields. A comprehensive validation exercise demonstrates a close match with existing benchmark solutions in limiting cases, affirming the reliability of the current computational model. The findings hold promising implications for applications in thermal energy storage, magnetic field-assisted heat transfer, and process intensification in magnetohydrodynamic devices.