A packed bed is composed of cubes 0.02m on a side. The bulk density of the packed bed,

A packed bed is composed of cubes 0.02m on a side. The bulk density of the packed bed,
with air, is 980kg/m3. The density of the solid cubes is 1500kg/m3.
a. Calculate the void fraction (??) of the bed.
b. Calculate the effective diameter (Dp), where Dpis the diameter of a sphere having the
equivalent volume.
c. Determine the sphericity of the cubes
d. Estimate the minimum fluidization velocity using water at 30oC and tower diameter
of 0.15m


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