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Which factor is considered in Ergun equation when the Reynolds number is less 20?

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in Fluidization Engineering by (102k points)
Which factor is considered in Ergun equation when the Reynolds number is less 20?

(a) 150

(b) 1.75

(c) 2.75

(d) 250

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This interesting question is from Fixed Bed topic in portion Fluidization and Mapping of Regimes of Fluidization Engineering

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Best answer
Right option is (a) 150

To elaborate: Since viscous forces predominate, 150 factor is considered.

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