2 PHASE NATURAL-CONVECTION ADJACENT TO A VERTICAL HEATED SURFACE IN A PERMEABLE MEDIUM

Two phase natural convection adjacent to a heated, vertical surface in a permeable medium is treated using boundary-layer approximations for conditions under which the vapor layer adjacent to the heated surface is thin. A similarity solution is obtained for the case in which density differences due to the phase change dominate those due to temperature variations in the liquid phase outside the vapor layer and for which the surface temperature, the temperature far from the surface, and the heat of vaporization do not vary with distance along the surface. The application of this solution to problems of practical interest using the approximation of local similarity is discussed. © 1979.