An experimental study was conducted in a 500 mm ID, 8,000 mm high jetting f
luidized bed with double vertical nozzles using frame-by-frame analysis of
experimental videos. Three different flow patterns (separated jets, flow tr
ansition and jet coalescence), with the two jets always coalesce within the
penetration depth, were first observed in the jetting fluidized bed. Radia
l profiles in the fluidized bed were measured with a PC-4 optical fiber pro
be. Effects of jet gas velocity and nozzle distance on the radial and axial
voidage distribution were studied. The bed hydrodynamic behavior was chara
cterized using a deterministic chaotic theory to analyze effects of jet gas
velocity static bed height, and nozzle distance on the correlation dimensi
on, which inn-eased with increasing jet gas velocity and static bed height.