Study on gas entrainment in sodium cooled fast reactors, 11; Applicability of vortex model based evaluation on vortex type gas entrainment

Ezure, Toshiki ; Ito, Kei*; Kameyama, Yuri*; Tanaka, Masaaki  ; Kurihara, Akikazu ; Ohshima, Hiroyuki

In order to establish an evaluation method of gas entrainment, gas entrainment experiments were performed in shearing flow geometry. Velocity distribution and vortex dimple depth were grasped simultaneously by means of PIV and visualization measurements. The vortex dimple depth was also evaluated by applying the measured velocity distribution to a vortex model. Then, the evaluated vortex dimple depth was compared with the experimental result. As the results, it was shown that vortex model based evaluation provided the appropriate results while having a certain conservativeness.