A packed bed of spherical particles is fluidized using air at and pressure . The packed–bed density is and superficial air velocity is from Ergun's equation and fluidize bed condition-equation.
Solution:
Fluidized bed condition:
is fluidized using air at 
and pressure 
. The packed–bed density is 
and superficial air velocity is 
from Ergun's equation and fluidize bed condition-equation.
