Analysis of the Combined Surface Radiation-Natural Convection in a Rectagular Enclosure with a Selectively Transparent Wall

선택적 투과성면을 가진 직사각형 밀폐공간에서의 표면복사 및 자연대류해석

A numerical study has been conducted on the combined radiation-natural convection heat transfer characteristics in a square cavity with a selectively transparent wall. The fluid in the cavity is assumed to be transparent to the thermal radiation. The effect of the wall emissivity is mainly considered in view of the temperature and flow fields. The comparison of the radiative heat flux and conductive heat flux variations along the isothermal wall is presented as well. The results show that the Nusselt number distribution is fairly uniform due to the com-pensative interaction of the radiation and convection heat transfer.