Speaker
Yuki Iwama
(Department of Sustainable Energy and Environmental Engineering)
Description
It is desirable to develop liquid lithium-lead (Li-Pb) blanket for helical-type fusion reactor because of its high cooling and tritium-recovering abilities. Since heat transport under a strong magnetic field in a fusion reactor determines the performance of liquid metal blanket (LMB), it is important to clarify the mechanism of the interaction between Li-Pb flow and the magnetic field. On the other hand, we have been studying flow characteristics of liquid Li jet using the liquid metal Li circulation facility at Osaka University experimentally and using computational fluid dynamics (CFD) code, ANSYS FLUENT numerically for IFMIF/EVEDA. Therefore, in this study, we aims to contribute to the development of LMB by clarifying magnetohydrodynamic (MHD) characteristics of liquid metal flow using the knowledge obtained from studies for IFMIF/EVEDA. In previous study, the simulation model of Li flow inside the nozzle of our Li loop was validated about the flow distribution by comparing with the water experiment, and thus the performance of MHD model equipped with ANSYS FLUENT was confirmed by the validated nozzle flow model as a starting point in this study. The turbulence model was Large Eddy Simulation (LES). It was assumed that uniform external magnetic flux was applied to the direction perpendicular to flow direction overall and the magnitude was set to 0.3 [T]. As a result, it was confirmed that vortices generated inside a boundary layer near a wall were clearly suppressed under the magnetic field and eddy currents were also generated near the wall. Then, we simulate Li-Pb flow with rectangular channel, which has an insulating wall, under non-uniform magnetic field based on this model. In this simulation, Reynolds number and Haltmann number are changed as a parameter to determine simulation conditions. This paper will also present the results of this simulation.
Co-authors
Eji Hoashi
(Department of Sustainable Energy and Environmental Engineering, School of Engineering, Osaka University, Osaka, Japan)
Hiroshi Horiike
(Department of Applied Nuclear Technology, Faculty of Engineering, Fukui University of Technology, Fukui, Japan)
Nobuo Yamaoka
(Department of Sustainable Energy and Environmental Engineering, School of Engineering, Osaka University, Osaka, Japan)
Takafumi Okita
(Department of Sustainable Energy and Environmental Engineering, School of Engineering, Osaka University, Osaka, Japan)
Takehiko Yokomine
(Department of Nuclear Engineering, Kyoto University, Kyoto, Japan)
Takeo Muroga
(Department of Helical Plasma Research, National Institute for Fusion Science, Gifu, Japan)
Yuki Iwama
(Department of Sustainable Energy and Environmental Engineering, School of Engineering, Osaka University, Osaka, Japan)
