Abstract
The fluidized-bed is important equipments in many industrial systems, such as chemical reactors, coal and/or incineration firing systems. Bed-material movement in the fluidized-bed has a mime importance in the heat transfer process. The fluidized-bed installed vertical-tubes was visualized by the neutron radiography system in JRR-3M. The image processing technique was applied to obtain quantitative data of void fraction. The visualized images clearly showed an interaction between rising bubbles and tubes. The flow pattern depended on the space between the vertical tubes.
