Analysis of closure relations for calculating interphase friction in gas-LHMC systems
The paper presents results of a review of closure relations forinterphase friction in gas-LHMC (liquid heavy metal cooling) two-phase systems and results of their verification against available experiment data. Two groups of closure relations are considered: the first group relations are based on a drift-flux model and the second group is based on other approaches. Also, several groups of experiments are considered: two-phase flows in small diameter pipes, large pipe flows and bubbling conditions. The study described in the paper was performed using the KORSAR computer code. The respective functionality of the code was modified to support the calculation of gas-LHMC two-phase systems. According to the results of verification there were chosen the most reliable correlations for each groupof experiments. In addition, the paper’s authors propose modifications of these correlations to achieve better agreement between calculated and experimental data.