Interfacial area transport of steam-water bubbly condensing flow

The theoretical modeling of condensation sink term in the interfacial area transport equation (IATE) was developed. This paper presents the theoretical models of interfacial area source and sink terms for condensing flow. In the subcooled condition the condensing region can be divided into two regions, In the heat-controlled region, the bubble diameter decreases graudlly, the residence time in the heat transfer-controlled region is long. Howere, in the inertia-controlled region the bubble are collapsed by the inertia of the surrounding liquid during a short time. The model developed in this study was evaluated against experimental data obtained from steam-water bubbly condensing flow. The Comparison of the experimental data to the present model prediction results show that the model can predict the axial interfacial area concentration profile well in steam-water bubbly condensing flow.