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Fluid Mechanics
Mechanical Operations
GATE 2010
Medium

The height of a fluidized bed at incipient fluidization is 0.075m, and the corresponding voidage is 0.38. If the voidage of the bed increases to 0.5, then the height of the bed would be

  • A0.058 m
  • B0.061 m
  • C0.075 m
  • 0.093 m

Explanation

Solid volume is conserved: (1−ε1)H1=(1−ε2)H2. (1−0.38)(0.075)=(1−0.5)H2 ⟹ 0.62×0.075=0.5×H2 ⟹ H2=0.093m.

Source: GATE CH 2010 (2010)

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