COMBINED RADIATION AND CONVECTION DUE TO A HEAT AND MASS SOURCE IN A DIVIDED ENCLOSURE

A numerical study for the unsteady two-dimensional compressible flow i n a rectangular enclosure is presented. The enclosure is divided in tw o identical parts by a vertical wall. Hot gases are injected in one pa rt of the enclosure. The authors have focused their attention on the t reatment of the injection of mass in a closed cavity, and for coupling the different heat transfers: the mass, momentum and energy equations are combined with the heat conduction equation through the dividing w all and with the radiation. The Navier-Stokes equations are solved by a finite-difference technique useful for the compressible flow at low Mach number. The numerical results with and without radiation in the e nclosure are compared. The results indicate that radiative heat transf er alters convective flow patterns significantly.