Advanced Prediction Method of Interfacial Area Concentration in Gas-Liquid Two-Phase Flow Analysis

Numerical analysis technology is required for the design of heat and mass transport systems that use gas-liquid two-phase flow. Since interfacial transport between the two phases depends on the interfacial area concentration (IAC), the development of a method for predicting the IAC has been the key to refining gas-liquid two-phase flow numerical analysis technology. In this study, we developed a four-sensor probe capable of measuring local IAC and other parameters. We constructed a database of two-phase flows in large-diameter pipes and rod bundles on an industrial scale. Furthermore, we used a high-speed camera and image processing to build a database of two-phase flows in narrow channels used in research reactors. Based on these databases, we developed a series of constitutive equations for the IAC of gas-liquid two-phase flows.