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Transient defluidization occurs when fluidizing gas is switched from a lower density gas to a higher density gas. The intensity of this phenomenon increases with decreasing particle size and with increasing difference between gas densities. In order to investigate the mechanism of this effect, images of the transient phenomenon were captured using a video camera and visualized using digital image...
A new method has been used to visualize particle movement and to observe the emulsion flow in a two-dimensional fluidized bed. The method is based on the ultraviolet light activation of particles impregnated with a photochromic dye solution. When activated, the particles changed their color to dark blue allowing their movement to be easily distinguished and tracked. This method enabled us to observe...
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