What is the value of Fanning friction factor f ' for smooth pipe at NRe = 106 approximately ?
Correct answer: A. 0.003
- A. 0.003
- B. 0.01
- C. 0.1
- D. 0.3
Explanation
For a smooth pipe at Reynolds number 10^6, the Fanning friction factor is about 0.0025 to 0.003, using the Blasius-type correlation as an estimate. Hence 0.003 is the closest choice; note that the Darcy friction factor would be about four times larger.
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