Host: The Japan Society of Mechanical Engineers
Name : The 30th International Conference on Nuclear Engineering (ICONE30)
Date : May 21, 2023 - May 26, 2023
In the simulation of boiling, it is important to select the appropriate interface tracking model and phase change model. In this study, the heat and mass transfer at the phase interface during the phase change was simulated based on the VOF model and the interfacial heat flux model. The both bubble growth process in the two-dimensional uniformly superheated liquid and attachd to the superheated wall was investigated in this study. It can be concluded that the interfacial heat flux model can not predict the 2-D bubble growth well and some no physical phenomena will occur in the simulation, though it can accurately predict the position of the phase interface in the 1D Stefan problem. The simulation results can show a good agreement with the theoretical solution by modifying the phase change conditions and mass transfer intensity. In this paper, it is proposed that the refinement of the grid or the increase of the mass transfer intensity can make the simulation more in line with the real situation when the interfacial heat flux model is applied. However. it is suggested to make a modification of phase change intensity in the UDF from the perspective of mass source term discretization since the simulation convergence and computing resources should be comprehensively considered.
