Catalyst pellets 0.2” in diameter are to be fluidized with of air at 1 atm and in a vertical cylindrical vessel. The density of the catalyst particles is . If the given quantity of air is just sufficient to fluidize the solids, what is the vessel diameter?
Answer:
Assume
(inertial effects are dominant)
Check,
(So the assumption of inertial effects being dominant is correct)
As an exercise, the students can calculate :
Check.,
(So the flow is not viscous)
Vessel-Area (cross-section)
of air at 1 atm and 
in a vertical cylindrical vessel. The density of the catalyst particles is 
. If the given quantity of air is just sufficient to fluidize the solids, what is the vessel diameter? 
(inertial effects are dominant) 
:
