Presentation Information
[1C12]Effect of Shear Stress on Wave Deformation on a Jet Interface
*Naoto Masaki1, Akiko Kaneko1, Naoki Horiguchi2, Hiroyuki Yoshida2 (1. University of Tsukuba, 2. JAEA)
Keywords:
Severe accident,3D-LIF,Interfacial Shear Stress,3D Interfacial Waves
During a severe accident in a light-water reactor, molten fuel may penetrate into the coolant in the form of a jet, undergo fragmentation, and eventually accumulate on the vessel lower head. To understand the fragmentation behavior, it is essential to clarify the deformation process of interfacial waves on the jet and their relationship with interfacial shear stress. In this study, three-dimensional interface geometry and velocity fields were obtained for a simulant molten-fuel jet using a 3D-LIF method and multi-section PIV, from which the distribution of interfacial shear stress was evaluated. Using these data, the relationship between the three-dimensional deformation of interfacial waves—from their growth to subsequent droplet formation—and the corresponding interfacial shear stress was examined, and the results are reported.