Numerical study on gas entrainment phenomena in fast reactor

Ito, Kei; Ohshima, Hiroyuki

Gas Entrainment (GE) phenomena in the basic experimental apparatus were studied numerically to make clear the dominant parameters on the GE phenomena that might occur in FBRs. In the numerical simulations, the PLIC type VOF model was employed to calculate these complicated free surface behaviors. The result of numerical simulation under the experimental conditions was compared to the experimental results to evaluate the accuracy of the numerical method. In addition, sensitivities of the suction velocity and the geometric configuration around the suction mouth on the GE behaviors were investigated. As a result, the numerical simulation showed good agreement with experimental data. In addition, two types of the GE were observed in this simulation result. The geometric configuration around the suction mouth also affected the GE behavior. These simulation results implied that the numerical simulation has enough potential to be used for the GE investigation.