Significance of buoyancy and Lorentz forces on water-conveying iron(III) oxide and silver nanoparticles in a rectangular cavity mounted with two heated fins: heat transfer analysis

摘要

During the production of iron(iii) oxide and silver nanoparticles where water is inevitable, little is known on the transport phenomenon in a rectangular cavity mounted with two heated fins on the bottom wall where buoyancy and Lorentz forces are significant. The natural convection heat transfer of hybrid nanofluid flow in a rectangular cavity mounted with two heated fins on the bottom wall is studied. The hybrid nanofluid containing the nanoparticles of Fe3O4 and Ag with water as base fluid is considered for the analysis. The derived governing partial differential equations are non-dimensionalized and solved numerically by applying the finite element method. It was concluded that at lower Rayleigh number and higher Hartmann number laminar flow is visible and at higher Ra and lower Ha, turbulent flow is seen. The intensity of the velocity profile and streamline function rises with the Rayleigh number. The nanoparticle volume fraction also affects the thermal profile and streamlined function.