Influence of thermal radiation on thermogravitational convection in a tilted chamber having heat-producing solid body

摘要

The present work represents a numerical calculation methodology which allows predicting the convective-ra-diative energy transport in an inclined cavity having an energy-generating body. The surfaces of left and right walls of the chamber are cooled, whilst the upper and down borders are thermally insulated. A square shaped solid block placed in the central zone of the chamber. The finite volume technique is employed to solve the general equations. A parametric study is performed tacking into account the following parameters: thermal conductivity ratio k* from 1 to 10, inclination angle of the cavity Φ from 0 to π/2 and emissivity of the surfaces ε from 0 to 1. The impact of the present parameters on both temperature and flow fields, as well as on Nusselt numbers is studied. So, under the radiation energy transport the buoyancy-induced flow gets diminished. The results illustrated that the influence of the thermal radiation on overall thermal transmission becomes strong with surface emissivity of energy-producing solid body and walls.