Engineering Board Exam Reviewer · Fluid Mechanics · hard
Water flows at 3 m/s in a 100 mm pipe that suddenly enlarges to 200 mm. What is the head loss due to the sudden enlargement?
- 0.4300 m
- 0.2580 m
- 0.4587 m
- 0.1147 m
Answer
B. 0.2580 m
Solution
V2 = 3(100/200)2 = 0.75 m/s. hL = (V1 - V2)2/2g = (2.25)2/19.62 = 0.2580 m.
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