MHD NATURAL CONVECTION OF HYBRID NANOFLUID IN A POROUS CAVITY HEATED WITH A SINUSOIDAL TEMPERATURE DISTRIBUTION
L. Jino, A. Vanav Kumar
Abstract
The present study addresses the numerical analysis of MHD natural convective fluid flow and heat transfer in a porous cavity filled with a hybrid nanofluid. The square porous cavity is heated nonuniformly from the left wall and cooled from the right wall. The upper and lower horizontal walls are kept adiabatic. The thermal aspect ratio influences the nonuniform sinusoidal temperature on the left wall. The pertinent governing equations are discretized via finite difference techniques and solved using a computational FORTRAN code. Flow effects are controlled by parameters such as thermal aspect ratio (Ar), Rayleigh number (Ra), Darcy number (Da), and Hartmann number (Ha) for solid volume fraction, φ = 0.02. Streamlines, isotherms, heatlines, local Nusselt number, and average Nusselt number graphically depict the flow by an Al2O3-water, Cu-water, or Al2O3-Cu-water nanofluid. Results show that the heat transfer rate increases with increasing the thermal aspect ratio, Rayleigh number, and Darcy number. Also, the hybrid nanofluid delivers a higher heat transfer rate on larger values of Ra and Da.