Collect. Czech. Chem. Commun. 1979, 44, 3201-3230

A mathematical model of the uniformly fluidized bed

Ján Beňa and Ivan Havalda

Department of Chemical Engineering, Institute of Chemical Technology, 880 37 Bratislava


In earlier published papers we have determined admissible geometrical structures (structures of type termed A and B) of equal-diameter spheres providing for the balance of forces - gravity, buoyancy and the force of resistance - on every particle in an unconfined bed. At constant superficial velocity of the fluid, porosity of bed as well as constant physical characteristics of particles and the fluid the bed may be stable for a unique geometrical configuration of the particles only, identical with that of the uniformly fluidized bed. This configuration can be determined for small numbers of the Archimedes group by formulation and solution of a mathematical model provided that the values of Ar, Re and ε for the uniformly fluidized bed are known.