Question

Water at 15 C is drained from a large reservoir using two horizontal plastic pipes connected in series. The first pipe is 13 m long and has a 10-cm diameter, while the second pipe is 35 m long and has a 5-cm diameter. The water level in the reservoir is 18 m above the centerline of the pipe. The pipe entrance is sharp-edged, and the contraction between the two pipes is sudden. Neglecting the effect of the kinetic energy correction factor, determine the discharge rate of water from the reservoir. The density and dynamic viscosity of water at 15°C are: 9991 kg/m3 and #1138 10-3 kgms, respectively. The loss coefficient is KL-0.5 for a sharp-edged entrance. and it is 0.4 for the sudden contraction, corresponding to diD2 52102-0.25. The pipes are made of plastic and thus they are smooth, -0. Solve this problem using appropriate software. 18 m Water tank 35 m 13 m The discharge rate of water from the reservoir is m3s.

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