For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is________________?
Correct answer: B. Less
- A. More
- B. Less
- C. Equal
- D. Independent of porosity
Explanation
Superficial velocity is based on the total packed-bed cross-sectional area, whereas the average channel velocity is based on the smaller void area. Therefore, superficial velocity is lower by approximately the bed void fraction.
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