Impacts of Radiation and Chemical Reactions on Magnetohydrodynamics Thermosolutal Convection in a Porous Cylindrical Cavity Incorporating the Soret and Dufour Effects
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Abstract
The objective of this study is to numerically and theoretically model the coupled heat and mass transfer in a porous, isotropic and saturated medium filled with a Casson nanofluid containing aluminium nanoparticles, taking into account the effects of radiation, chemical reactions, a magnetic field and the Soret and Dufour effects. The analysis is conducted for various parameters relevant to the model, including the chemical reaction parameter (ranging from 0–20), the radiation parameter (0–2), the Casson fluid parameter (0.1–1), the Soret and Dufour numbers (0–1), the conductivity ratio (1–3), the Hartmann number (0–100) and the thrust ratio (1–2). The horizontal boundaries of the cavity are maintained at constant temperature and concentration, while the vertical walls are assumed to be rigid, impermeable and adiabatic. The flow of the Casson nanofluid in the porous medium is governed by the extended Brinkman–Forchheimer–Darcy law. The system of equations is solved using the finite volume method. The findings reveal that the heat transfer rate increases with the chemical reaction parameter, geometric aspect ratio, Casson fluid parameter, thermal conductivity and thrust ratio. Conversely, the heat transfer rate decreases with higher Hartmann and Dufour numbers. Regarding mass transfer, it increases with higher thermal conductivity, thrust ratio and geometric aspect ratio, but decreases with higher Hartmann number, Soret effect and chemical reaction parameter.
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References
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