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Fluid Mechanics Assignment - Viscous Flow in Pipes

Q1. As shown in the figure below, water "bubbles up" 3 in. above the exit of the vertical pipe attached to three horizontal pipe segments. The total length of the 0.75-in - diameter galvanized iron pipe between point (1) and the exit is 21 in. Determine the pressure needed at point (1) to produce this flow if the water flow rate is 90 lit/min.


Q2. Water flows through a 6-in.-diameter horizontal pipe at a rate of 2.0 ft3/sec and a pressure drop of 4.2 psi per 100 ft of pipe. Determine the pipe roughness. Solve using SI units.

Q3. Water flows at a rate of 2 ft3/sec in an old, rusty 6-in diameter pipe that has a relative roughness of 0.010. It is proposed that by inserting a smooth plastic liner with an inside diameter of 5 in. into the old pipe the pressure drop per meter can be reduced. Will the plastic liner reduce the pressure drop? Calculate the pressure drop in both cases to answer this question.

Q4. In The figure shown, water is pumped form the lake through the commercial steel pipeline shown. The pump delivers a pressure head of 23 meters to the fluid. What is the minimum pipe diameter that makes the fluid exit at a minimum pressure of 3 atma, knowing that the required flow rate is 600 lit/hr. The commercially available pipe diameters are 1/4", 3/8", 1/2", 5/8", 3/4", 1". Note: All elbows are flanged.


Mechanical Engineering, Engineering

  • Category:- Mechanical Engineering
  • Reference No.:- M93130669

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