Effects of interphase momentum exchange models on simulation of subcooled flow boiling

This research aimed to explore the accuracy of different momentum exchange models in the Eulerian multiphase method. Effects of different correlations for interaction forces on predicting of subcooled fluid flow boiling parameters in heated vertical tubes were studied numerically. Specifically, numerical simulations were carried out using several combinations of the momentum exchange coefficients separately. The results were compared with the experimental data of two benchmark test cases, and the error percentages were calculated. Results indicated that the accuracy of the two-phase simulations depended on the selection of the appropriate combination of momentum exchange models. However, it was found that modeling drag with Ishii and Universal, lift with Moraga and Saffman, wall lubrication with Antal et al. and Hosokawa, turbulent dispersion with De Bertodano, and turbulent interaction with Troshko-Hassan correlations generally led to higher accuracy. The results showed that the experimental benchmark data could be simulated numerically with the minimum relative error of 6.97%. The study also showed that wall lubrication and lift had negligible impacts on the numerical results for most working conditions.