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Fluid Mechanics
Mechanical Operations
GATE 2018
Medium

Two packed towers are designed for the same mass velocity of the gas. Tower 1: liquid/gas flow rates 30/1.2 kg/s. Tower 2: 67.5/1.8 kg/s. The ratio of the design diameter of the wider tower to the narrower tower is

  • A2
  • B1.8
  • C1.5
  • 1.225

Explanation

Same gas mass velocity means Area∝gas flow rate: Area2/Area1=1.8/1.2=1.5. Diameter ratio=√1.5=1.225.

Source: GATE CH 2018 (2018)

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