Abstract
In order to apply Flibe as a liquid blanket material, a heat transfer enhancement system is required because the Flibe is a high Prandtl number fluid. The purpose of this study is to visualize the detailed flow fields in the packed-bed tube, which is expected to utilize for the heat transfer enhancement. The visualization inside the packed-bed tube is performed by using a PIV system with a refractive index matching technique. The flow field in the packed-bed tube is visualized from various angles by the PIV system to describe the complicated flow structures in it.
