Development of three-dimensional one-way bubble tracking method for boiling flow

A three-dimensional one-way bubble tracking method is a promising numerical method for calculation of time-spatial evolution of gas-liquid interfacial configuration with use of a little computing resource. Since the method has been applied to only an adiabatic air-water bubble flow, the method was developed for analysis of a boiling flow in this study. One-dimensional Eulerian equation of energy conservation for a continuous liquid phase and interface heat transfer equation for dispersed bubbles were introduced. Then, radial liquid temperature distribution, wall heat transfer between a heated wall and subcooled liquid, bubble generation on a heated wall and expansion or condensation of bubbles were taken into account. The developed method was applied to the boiling flow experiment and radial void fraction distribution was compared. It was confirmed that the method could give good prediction of tendency of the void fraction distribution in the boiling flow. (author)