Question

Two large tanks are connected by two pipes of different size in parallel. Water temperature is 20°C.

The surface water elevation in the upstream reservoir (Reservoir I) is 175m. The length of each pipe is 1250 m, and other properties are specified in the following:
Pipe A: diameter 0.5m, and frictional factor 0.025;

Pipe B: diameter 0.25m, the frictional factor is not given, but relative roughness is 0.006 under the flow condition observed.
Flow velocity in Pipe A is 2m/s.

1. a) (5 pts) Is the flow in pipe A laminar or turbulent? Support your answer with calculations

2. b) (10 pts) Find the water surface elevation of the downstream reservoir (Reservoir II) Z2 based on flow in pipe A.

3. c) (20 pts) Calculate the flow velocity in Pipe B.

4. d) (5 pts) Find the total flow rate from reservoir I to reservoir II.

Answer 1

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