article · Case Studies in Thermal Engineering
Industrial and residential settings increasingly require consistent energy supplies, which can be supported through advanced thermal processes such as thermoelectric power generation. This theoretical study analyses two-phase boundary layer flow of a dusty water-based nanofluid containing aluminium oxide nanoparticles moving across a vertical flat plate. By employing the Chebyshev collocation spectral method, the investigation evaluates linear, quadratic, and nonlinear thermal radiation models alongside quadratic Boussinesq and Prandtl boundary layer approximations. The analysis models the effects of magnetic fields, momentum dust, and thermal Grashof numbers on fluid velocity and temperature profiles. The results reveal that nonlinear thermal radiation generates the highest rate of thermal transport, followed by quadratic and linear radiation. Furthermore, a transverse magnetic field diminishes fluid velocity, while incorporating aluminium oxide nanoparticles at a 3 percent volume concentration substantially enhances heat transfer.
Enhancing heat transfer efficiency is critical for maintaining stable power supplies in both industrial manufacturing and residential settings. Understanding how different thermal radiation types, magnetic fields, and suspended nanoparticles interact helps engineers predict fluid behaviour, leading to the development of better-performing thermal management systems and thermoelectric power devices.
The insights could assist thermal engineers and equipment designers working on thermoelectric generators and optical heat systems by identifying fluid compositions and radiation conditions that maximise heat movement. However, because this research is based entirely on numerical simulations and mathematical approximations, it represents early-stage foundational work that requires physical experimentation and prototyping before practical commercial adoption.
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The need for a consistent and reliable energy supply to improve productivity is steadily increasing both in industrial and residential settings. The fulfillment of this requirement can be effectively achieved by implementing quadratic thermal radiation, such as utilizing an appropriate thermoelectric generator to supply power and optimizing the optical heat process. This research investigates the three different thermal radiation models, namely linear, quadratic, and nonlinear thermal radiation on the two-phase boundary layer flow of a dusty nanofluid across a vertically moving flat plate. The nanofluid is composed of aluminum oxide (Al203) and nanoparticles suspended in water (H20) based fluid. Furthermore, quadratic Boussinesq approximation and Prandtl's boundary layer approximation are utilized. The Chebyshev collocation spectral method is employed to address the non-linear problem. The effect of different parameters, such as thermal Grashof number, momentum dust, magnetic field parameter on the fluid flow, and temperature profiles are considered to visualize the findings. The findings show that linear thermal radiation exhibits the lowest thermal transport, followed by quadratic thermal radiation, with nonlinear thermal radiation demonstrating the highest thermal transport. The velocity of the dusty nanoliquid is decreased when a transverse magnetic field is present. Additionally, it is observed that the existence of aluminum oxide nanoparticles of 3% volume concentration in particulate H20 effectively increases the thermal transfer of the fluid system.
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DOI: 10.1016/j.csite.2024.104073
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