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Evaluation of Flow Structure in Packed-Bed Tube by Visualization Experiment

Masumi Okumura, Kazuhisa Yuki, Hidetoshi Hashizume, Akio Sagara

Fusion Science and Technology / Volume 47 / Number 4 / May 2005 / Pages 1089-1093

Technical Paper / Fusion Energy - First Wall, Blanket, and Shield /

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 be utilized for the heat transfer enhancement. The visualization inside the packed-bed tube from various angles is performed by using a PIV system with a refractive index matching technique. Pressure loss characteristics in the packed-bed tube whose sphere diameter is half the length of tube inside diameter are evaluated and it is found that a drag model could be suitable to estimate the pressure loss of the packed-bed tube.

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