GATE2012-32

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A bed of spherical glass beads (density 3000 kg/m$^{3}$, diameter 1 mm, bed porosity 0.5) is to be fluidized by a liquid of density 1000 kg/m$^{3}$ and viscocity 0.1 Pa.s. Assume that the Reynolds number based on particle diameter is very small compared to one. If g = 10m/s$^{2}$, then the minimum velocity (in m/s) required to fluidize the bed is

1. 3.33x10$^{-4}$
2. 3.33x10$^{-1}$
3. 3
4. 30
in Others
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