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In this paper, the problem of hydromagnetic convective flow along a semi-circular enclosure filled with nanofluidsusing a two-dimensionalnon-homogeneous model have been studied numerically.The circular wall of the enclosureis maintained at constant cold temperature whereas various combinations of the thermal boundary conditions at the bottom heated wall are considered. The enclosureis permeated by an inclined uniform magnetic field and the effects of gravity, Brownian motion and thermophoresis are incorporated into the nanofluid model. In the numerical simulation, here isconsidered water, kerosene as basefluids and Cobalt34, Fe Oas nanoparticles. The Galerkin weighted residual finite element method has been employed to solve the governing partial differential equations after converting them into a non-dimensional form using a suitable transformation of variables. The effects of various parameters such as Hartmann numberandRayleigh number on isotherms have been displayed graphically for 34Fe O -waternanofluid. The heat transfer augmentation for various thermal boundary conditions hasbeen done from the bottom heated wall for 34Fe O -waterandCobalt-kerosenenanofluid. The results show that the heat transfer rate can be decreased with the increasing values of the Hartmann number but it can be increased by increasing the Rayleigh number. The obtained numerical results also indicate that the variable thermal boundary conditions have significant effects on the flow and thermal fields. Finally, it is observed that the heat transfer rate is higher for Cobalt-kerosenenanofluid than for 34Fe O -waternanofluid. |
