The eddy diffusivity for a liquid in plug flow must be_________________?
Correct answer: B. 0
- A. 1
- B. 0
- C. ∞
- D. Between 0 and 1
Explanation
Ideal plug flow has no radial or axial back-mixing, so the turbulent or eddy diffusivity in the flow direction is taken as zero. A nonzero diffusivity would cause mixing and departure from ideal plug flow.
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