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What is the range of Ut/Umf for flexible operation of the fluidized bed?

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+1 vote
in Fluidization Engineering by (102k points)
What is the range of Ut/Umf for flexible operation of the fluidized bed?

(a) 10:1 to 90:1

(b) 5:1 to 10:1

(c) 90:1 to 120:1

(d) 120:1 to 200:1

I got this question during an interview.

This key question is from Terminal Velocity of Particles topic in chapter Fluidization and Mapping of Regimes of Fluidization Engineering

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Best answer
Correct option is (a) 10:1 to 90:1

Easy explanation: This range provides best conditions for fluidization without much entrainment.

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