Measurement of Characteristics of Vapor Bubble Condensation in Subcooled Boiling Flow Using Image Data Processing

Abstract

Two-fluid and three-fluid models are used for safety analysis and design cords of light water reactors (LWRs). Interfacial area concentration, interfacial heat transfer and interfacial shear stress have never been understood enough for these numerical codes. Since it is very difficult to measure these phenomena, there is a shortage of the correct experimental data. In the present work, a digital image processing method, consisted of a digital video camera, a stroboscope, a personal computer and data processing software, was developed and applied to subcooled boiling flows. As a result, bubble condensation characteristics under a subcooled boiling condition is clarified.