Study on Effects of Slots on Natural Convection in a Rectangular Cavity Using CFD

摘要

This paper investigates those characteristic convection wonders on a rectangular nook hosting pit with separate opening proportion need to be investigated utilizing CFD. The straight divider confronting those opening with slots is heated by uniform heat flux and sides perpendicular to the heated side are insulated. Conservation of mass, momentum, and energy equations are solved considering the constant value of fluid properties and Boussinesq approximation. The isotherms and streamlines are produced and heat transfer is calculated for Rayleigh number that varies for a different number of slots from 2 to 5. Two different pit perspective proportions, A = L/H > 1 and A = L/H < 1 are taken with constant Prandtl number value of 0.7. The influence of Ra, N, and OR on the Nusselt number is investigated. The results obtained reveal that the value of Nu increases with the increase in the value of Ra and OR. The results show that at lower Rayleigh number the heat transfer across the fluid layer is dominant by conduction due to the absence of circulation of air inside the cavity.