Answer Happy

A straight, round pipe is solicited to drain an upper level reservoir Z = 37 m of estimated water volume 8400 m2 to a lower level reservoir Z2 = 0 m. The pipe's total length is L = 79 m. For environmental reasons, the reservoir should be emptied in a continuous and steady manner over a period of one week (7 days). Take the attached drawing for illustration only, so you may assume the two reservoirs to have small depths and large surface areas. Your task is to analyze the problem to help accomplish the drainage project: (a) Compute the required pipe diameter Dideat assuming an ideal or frictionless flow inside the pipe. (25 pts] (b) For this part the real-life pipe diameter is given as Dreal = 7.5 cm, and the resulting flow rate is to be estimated. You are to assume a real life scenario with real flow inside the pipe (not ideal). Furthermore, consider the pipe to have a hydrodynamically smooth internal surface, of mean roughness height equal to zero. How many days will it take in reality to empty the reservoir? [45 pts] = 02 프 Water at 20°C D 2 DI Zz 플 L Solution: