Simulation of Premixing Experiment QUEOS by SIMMER-III

Cao, X.; Tobita, Yoshiharu

The QUEOS,an experiment of the premixing phase of fuel coolant interactions(FCls), in which several kilograms of solid molybdenum spheres with low temperature (Q-8 300K) and high temperature (Q-12 2300K) are released into water, are simulated to evaluate the drag correlations between the fuel and coolant liquid on the mixing region in FCls, by SIMMER-III code, in which lshii's drag correlations in dispersed two-Phase flow are employed. The calculated results suggest that the momentum exchange between the spheres and coolant liquid is overestimated in the hot sphere cases by employing the current drag conrrelations. The difference of the advancement of the sphere cloud between experiments and simulations induced by the drag coefficients is discussed through the change of the multiplier of the drag coefficients.