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EFFECTS OF RADIATION ABSORPTION, SORET AND DUFOUR NUMBERS ON MHD THERMOSOLUTAL CONVECTION IN A POROUS CYLINDRICAL CAVITY FILLED WITH A CASSON NANOFLUID
Keywords:
MHD, radiation absorption, thermosolutal convection, Casson nanofluid, Soret and Dufour effectsDOI:
https://doi.org/10.17654/0973576324026Abstract
The objective of this study is the numerical and theoretical modeling of the thermal convection of a solute in a saturated isotropic porous medium filled with Casson nanofluid (Aluminum nanoparticle) under the effect of absorption of radiation, magnetic field, Soret and Dufour numbers. The calculations depend on different parameters associated with the model, namely Casson’s fluid parameter $(0.1 \leq \beta \leq 1)$, Radiation absorption number $\quad(1 \leq R \leq 2)$, Soret number $\quad(-1 \leq S r \leq 1)$, Dufour number $\quad(-1 \leq D u \leq 1)$, the conductivity ratio $(1 \leq \chi \leq 2)$, the Hartmann number $(0 \leq H a \leq 100)$, the thrust ratio $(1 \leq N \leq 2)$. We observe that heat transfer and mass transfer both increase with increase in radiation parameter. We also notice that heat transfer and mass transfer both decrease with increase in Hartmann, Soret and Dufour numbers. The horizontal walls of the enclosure maintain a uniform temperature and concentration, while the side walls are rigid, impermeable and adiabatic. Casson nanofluid flow occurs in a porous layer and is described by the extended Darcy-Brinkman-Forchheimer law. The resulting system of equations was spatially discretized using the finite volume method. Therefore, the influence of various parameters on the heat transfer coefficient and concentration was studied.
Received: April 9, 2024
Revised: April 24, 2024
Accepted: May 8, 2024
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