- Tiittim 0 025 V Laminar Flow 0 02 Alaminar Critical Transition Flow Zone Zone 0 018 0 016 Complete Turbulence Rough 1 (609.22 KiB) Viewed 12 times
Plz dont just copy answers from another question as they are
wrong! redo plz so i dont dislike.
TIITTIM 0.025 V Laminar flow - 0.02 Alaminar. Critical Transition flow zone zone 0.018 0.016 Complete turbulence, rough pipes 0.05 0.04 0.03 0.014 0.012 0.02 0.015 0.01 Recit 0.01 0.008 0.006 0.008 0.007 0.004 Relative roughness, Ed Friction factor, f 0.006 0.002 FIGURE Q6 0.005 0.001 0.0008 0.0006 0.0004 0.0002 0.0001 0.004 E or k (mm) Riveted steel 1 - 10 Concrete 0.3 - 3 Wood stave 0.2 - 1 0.003 Cast iron 0.25 Galvanized steel 0.15 Asphalted cast iron 0.12 0.0025 Commercial steel or wrought iron 0.045 Drawn tubing 0.0015 0.0024 79 2 3 4 5 6 7 9 2 10' 10* Smooth pipes 0.00005 0.000,001 0.000,005 3 4 5 679 10 0.00001 3 4 5 6 7 9 100 2 3 4 5 6 7 9 10 2 3 4 5 6 7 9 Reynolds number Re Moody Diagram
6. a) Write down Darcy's equation for the head loss due to friction in a circular pipe and define all the terms that appear in the equation. What are the main parameters that the pipe friction coefficient depends on? [2 marks] b) Oil is pumped at a rate of 2400 kg/s from a storage tank to a refinery 150 km away through a pipe of 1.25 m inner diameter. The pipe wall roughness is 0.125 mm, the density of the oil is 800 kg/m3, the dynamic viscosity of the oil is 2.44x10-3 Ns/m2, and the acceleration due to gravity, g = 9.81 m/s2. i) Calculate the volumetric flow rate of the oil. [1 mark] ii) Calculate the Reynolds number of the oil flow. [2 marks] iii) Is the flow of oil laminar or turbulent? Justify your answer. [1 mark] iv) Use the Moody diagram shown in FIGURE Q6 (on the next page) to determine the friction coefficient of the pipe. [2 marks] v) Calculate the head loss due to friction in the pipe. [2 marks]