R. Boerefijn et M. Ghadiri, HIGH-SPEED VIDEO IMAGE-ANALYSIS OF FLOW OF FINE PARTICLES IN FLUIDIZED-BED JETS, Advanced powder technology, 9(3), 1998, pp. 229-243
The hydrodynamics of gas/solids mixtures, e.g. in fluidization and pne
umatic conveying, has a distinct effect on the breakage and degradatio
n of powders. Visualization by means of high speed video imaging of th
ese processes enables a better understanding of the mechanics of these
processes and verification of the models developed for describing the
process. In this paper, the development and use of high speed photogr
aphy and video imaging and image processing and analysis for the measu
rement of particle velocities and concentrations, and divergent angles
of gas jets in fluidized beds are described. The implications of the
observations and measurements on design and control of these processes
are indicated.