The equations to calculate incipient fluidizing velocities

pressure

voidage

interstitial gas velocity

bed expansion and pressure drop in centrifugal fluidized beds are obtained by simplifyirg and solving the governing equations based on the interacting continua theory. The predictions of the pressure drop across the bed and the critical fluidizing velocity agree well with the expeririental results. The theoretical analyses show that the granules centrifugal fluidized bed is gradually fluidized layer by layer

from the inner surface outward

in the range of the gas velocities. When fluidization is achieved

the fluidization degree for each bed layer at the different radial positions is different. The influences of gas compressibility on the behaviour of the bed increase with the increase of rotational speed of bed.