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Match each non-ideal flow model with its adjustable parameter.
List I
A. Tanks in series
B. Axial dispersion
C. Compartment model
D. Segregation model
List II
1. the fraction of dead and active volume
2. the number of equivalent tanks
3. no parameter beyond the distribution itself
4. the dispersion or Peclet number

  • A.A-3, B-1, C-4, D-2
  • B.A-2, B-4, C-1, D-3
  • C.A-4, B-2, C-1, D-3
  • D.A-2, B-4, C-3, D-1

Answer: B

Each is a one parameter description fitted to the measured curve, and the choice between them is largely one of convenience. The dispersion model suits tubes while tanks in series suits vessels. Each carries a single adjustable number.

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