Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

New developments in the framework of a common project simulating subcooled boiling are described. The computational model used combines the Euler / Euler two-phase flow description with heat flux partitioning. Main achievements were a comprehensive study of the boiling process itself and a better description of the interfacial area by coupling of wall boiling with a population balance model. The paper presents validations and shows the capabilities of the model extensions. A careful calibration of correlations used in the wall boiling model is necessary to obtain agreement with the measured data. For the demonstration, DEBORA tests were used. During these tests radial profiles for gas volume fraction, gas velocity, liquid temperature and bubble size were measured.