Modeling of condensation heat transfer in a reactor containment

A simple condensation model for forced and natural convection in the presence of a noncondensable gas is derived by using the analogy between mass, momentum, and energy transfer. The effects of a wavy interface are implemented in this model by using correlations for the rough wall surface. A two dimensional condensation model using a k-epsilon model for the turbulent vapor air flow was also developed to investigate the effect of two-dimensional flow and to provide a sound theoretical basis for the simple model. Each model is compared with the available separate effects experimental data. The forced convection model is then compared to the Carolinas Virginia Tube Reactor (CVTR) integral test by using the vapor-air velocity predicted by a separate two dimensional fluid dynamics model. The effect of countercurrent flow is also considered in this comparison. The natural convection model is also compared to the steady state integral data of Tagami. The comparison shows good agreement with both sets of experimental data