Darcy formula for loss of head in pipes is given by, hf=4fl v2 / __________________?
Correct answer: C. 2gd
- A. g2d
- B. gd
- C. 2gd
- D. gd2
Explanation
Using the Darcy-Weisbach convention in the question, head loss is given by hf = 4fLv²/(2gd). The factor 4 appears when the friction factor is defined using the pipe-friction convention adopted in many water-engineering texts.
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