F00 mm, rough luid in the pipe btained from t what is the % er

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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3. Use the Moody diagram to find the shear stress and major loss in a pipe with a diameter of
600 mm, roughness e of 0.6 mm and length of 2500 m. The discharge is 450 L/s and the
fluid in the pipe is air (p = 1.25 kg/m' and v = 1.5 x 10° m/s). Compare the friction value
obtained from the Moody diagram with the value obtained from the friction equations and
what is the % error.
The Moody Chart
0.1
0.09
Laminar Transitional Turbulent
flow
flow
flow
0.08
Fully rough turbulent flow (flevels off)
0,07
0.05
0.04
0.06
0.03
0.05
0.02
0.015
0.04
0.01
0.008
0.006
0.03
0.004
0.025
0.002
0.02
0.001
0.0008
0.0006
Roughness, e
Material
ft
mm
0.0004
0.015 Glass, plastic
Concrete
Wood stave
0.003-0.03
0.9-9
Smooth pipes
0.0002
0.0016
0.5
0.000033
0.00000S
0.00085
0.0005
Rubber, smoothed
01
eD = 0
Copper or brass tubing
Cast iron
0.0015
0.0001
0.26
0.01 Galvanized iron
Wrought iron
0.00005
0.15
0.00015
0.046
eD = 0,000005
0.009 Stainless steel
Commercial steel
0.000007
0.00015
0.002
0.045
leD = 0.000001
0.00001
103 2(10) 3 4 56 8 104 2(10) 3 4 56 8 105 2(10) 3 4 56 8 106 2(10) 3 4 5 6 8 107 2(10) 3 4 56 8 108
0.008
Reynolds number, Re
Darcy friction factor,f
Relative roughness, elD
Transcribed Image Text:3. Use the Moody diagram to find the shear stress and major loss in a pipe with a diameter of 600 mm, roughness e of 0.6 mm and length of 2500 m. The discharge is 450 L/s and the fluid in the pipe is air (p = 1.25 kg/m' and v = 1.5 x 10° m/s). Compare the friction value obtained from the Moody diagram with the value obtained from the friction equations and what is the % error. The Moody Chart 0.1 0.09 Laminar Transitional Turbulent flow flow flow 0.08 Fully rough turbulent flow (flevels off) 0,07 0.05 0.04 0.06 0.03 0.05 0.02 0.015 0.04 0.01 0.008 0.006 0.03 0.004 0.025 0.002 0.02 0.001 0.0008 0.0006 Roughness, e Material ft mm 0.0004 0.015 Glass, plastic Concrete Wood stave 0.003-0.03 0.9-9 Smooth pipes 0.0002 0.0016 0.5 0.000033 0.00000S 0.00085 0.0005 Rubber, smoothed 01 eD = 0 Copper or brass tubing Cast iron 0.0015 0.0001 0.26 0.01 Galvanized iron Wrought iron 0.00005 0.15 0.00015 0.046 eD = 0,000005 0.009 Stainless steel Commercial steel 0.000007 0.00015 0.002 0.045 leD = 0.000001 0.00001 103 2(10) 3 4 56 8 104 2(10) 3 4 56 8 105 2(10) 3 4 56 8 106 2(10) 3 4 5 6 8 107 2(10) 3 4 56 8 108 0.008 Reynolds number, Re Darcy friction factor,f Relative roughness, elD
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