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Unsteady Mixed Convection In A Porous Media Filled Lid-Driven Cavity Heated By A Semi-Circular Heaters, Saad Mekhilef
Unsteady Mixed Convection In A Porous Media Filled Lid-Driven Cavity Heated By A Semi-Circular Heaters, Saad Mekhilef
Saad Mekhilef
A computational study has been performed on natural convection heat transfer and fluid flow in a porous media filled enclosure with semi-circular heaters by using finite element method. The ceiling of the cavity moves with a constant velocity and it is insulated. Temperature of vertical walls is lower than that of heaters. Results are presented via streamlines, isotherms, average Nusselt numbers and cross sectional velocity for different governing parameters such as Richardson number, Darcy number and dimensionless time. It is observed that both circulation of the flow and heat transfer is strongly affected with time increment and Darcy number inside …
Unsteady Natural Convection In Al2o3–Water Nanoliquid Filled In Isosceles Triangular Enclosure With Sinusoidal Thermal Boundary Condition On Bottom Wall, Saad Mekhilef
Saad Mekhilef
Unsteady natural convection heat transfer in an isosceles triangular enclosure filled with Al2O3 nanoparticle is studied by using finite element method. The bottom of the isosceles triangular cavity is heated non-uniformly and temperature of the inclined wall is lower than that of the bottom wall. The governing parameters are Rayleigh number, solid volume fraction, aspect ratio (H/L) of the enclosure and dimensionless-time. It is found that addition of the nanoparticle into base fluid (water) affects both heat transfer and fluid flow. Heat transfer increases with addition of nanoparticle and increasing of Rayleigh number. Conduction mode of heat transfer becomes dominant …