Question

Doe: 4pm, August 27,2018 Question 1 will be marked in detail For Question 1, use the problem-solving protocol and show all working, Questions 2, 3,4 and 5 will be marked for quality and complctcnecss only and can be trcated as extensions of Question 1. Solutions will be provided aftert the marking is compickt 1. Water flows through a very loag 50 mam ID Onternal Diameter) galvanised iroa pipe. The pipe is horizontal and has an internal roughness height af ε 015 min. The pressure dop along a 100m long section of the pipe is 10 kPa. Find the friction factor f, Reynolds number and average 122 marks speed of the flow in the pipe. Is the pipe flow laminar or turbulent? Repeat question 1 but assume smooth plastic pipe (rouphness height 0). [3 marks] 2. 3. Repeat question 1 but assume that the flow rate has decreased so that the pressure drop along the 100m section of the pipe is now 10 Pa [3 marks 4. Water flows through a very long palvanised iron pipe of unknown diameter. The pipe is horizontal and has an intenal roughness height of 0.15 mm. The pressure drop along a 100m long section of the pipe is 10 kPa and the average velocity in the pipe is 054 m/s. Find the pipe diameter, friction factor f, and Reynolds number. Is the pipe flow laminar or turbulear? [5 marks) 5. MASTERS STUDENTS ONLY. Water flows through a very long 50 mm ID (Intemal Diametet) alvarised ron ppe. The pipe is horizontal and has an internal roughness height of 0.15 mm. The average velocity in the pipe is 0.71 m/'s. Find the pressure drop along a 100m long secticn of the pipe, the friction factor f, and the Reynolds number. Is the pipe fow laminar or turbulent? [3 narks) The fluid properties for water are as follows: p = 1000 kg/m, 112x 10, Nsmr Please write your answers in the following table and submait this with your solution 054 Note: Assessment will be based primarly on the method of approsch, including the eccuplezeness of the tnalysis and the assumptions thnt aze made Hint Use the problens solving protocoi Problem I only) Draw a dagram of the pipe and a ste amline between two pounts 100 m apart. Apply the euergy equation betwmeen the mo points Simpläfy using given infomnation, continuty and approprinte asaumptions, then solve

Answer 1