화학공학소재연구정보센터
International Journal of Heat and Mass Transfer, Vol.37, No.17, 2661-2673, 1994
An Analysis of Subcooled Turbulent Film Boiling on a Moving Isothermal Surface
When film boiling occurs on a moving superheated surface, the vapor layer which forms between the surface and liquid reduces the drag force and heat transfer. In this study, heat transfer associated with subcooled turbulent film boiling on a moving isothermal surface is investigated using both local similarity and integral methods. Using a two-phase boundary-layer model and assuming power-law profiles for the velocity and temperature distributions, integral forms of the mass, momentum and energy-conservation equations, together with compatibility conditions at the vapor-liquid interface, were solved for both the vapor and liquid layers. In order to assess the merit of this analytical procedure, a local similarity solution to the same problem was obtained using the modified Cebeci-Smith eddy-viscosity model with the Cebeci-Bradshaw algorithm for turbulent boundary-layer flow. Numerical results reveal the effects of relevant parameters such as plate velocity, the ratio of plate-to-free-stream velocity, and liquid subcooling.