Abstract
A numerical investigation has been made of thermal radiation effects in an enclosure, which is formed by a constant temperature wall, an adiabatic wall, two openings, and block heat sources. The relevant governing parameters were the heating number, Nr from 0.05 to 500, the cavity aspect ratio, A = H/ L from 0.1 to 1, and the number of heaters, N, an odd number ranging from 1 to 19. Heat transfer by natural convection solely and with thermal radiation on the thermal and flow characteristics of the system is studied. A parametric study illustrates the influence of the heating number, aspect ratio, the number of heaters, thermal radiation on the thermal loading characteristics of the system, Nusselt number, and the maximum stream function rate. The results reveal the main characteristics of thermal loading by radiative heat sources.
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