Water (20C) is pumped from a tank through a 2" pipe with an average velocity of 2 m/s. Since the characteristics of the flow influences pressure loss and heat transfer properties of the water the flow must be characterized. 1. Is the flow laminar or turbulent? 2. Calculate the average and minimum time for the water to run through a 15 m long pipe 3. Calculate the amount of water that is necessary in the tank so that the system can run for at least 120 sec. 4. Calculate the highest average velocity to maintain laminar flow in the pipe

5. Calculate the Reynolds number if the tank only takes 100 kg but the total time for emptying the tank is still 120 sec

A4