Oil flows through a circular pipe at a rate of 0.4m^3/s. Density p= 960kg/m3 Length of Pipe = 120mHead loss along the length = 7mRoughness of the pipe, ks = 0.07mmKinematic viscosity v= 2 x 10^(-5) m2/sFind the diameter of the pipe to 3dp.(The final solution should be 0.34m, but i am confused with the method so if you could put a few notes next to calculations that would be very helpful). Ive attached a copy of the moody diagram aswell as it is relevant. Figure 6. The Moody DiagramFriction Factor0.10.090.080.070.060.050.040.030.020.0150.01Laminar Flow64ReMaterialConcrete, coarseConcrete, new smoothDrawn tubingGlass,Plastic PerspexIron, castSewers,oldks (mm)0.250.0250.00250.00250.153.00.1Steel, mortar lined.Steel, rusted0.5Steel, structural or forged 0.025Water mains, old1.010³104Moody DiagramTransition RegionComplete turbulenceFriction Factor =AP106Reynolds Number, Re=pVdHSmooth Pipe10'0.050.040.030.020.0150.010.0050.0020.0015x10-42x10-10-45x107Relative Pipe Roughness10-55x10-610-6108

Answered: Oil flows through a circular pipe at a…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

Oil flows through a circular pipe at a rate of 0.4m^3/s.

Density p= 960kg/m3

Length of Pipe = 120m

Head loss along the length = 7m

Roughness of the pipe, ks = 0.07mm

Kinematic viscosity v= 2 x 10^(-5) m2/s

Find the diameter of the pipe to 3dp.

(The final solution should be 0.34m, but i am confused with the method so if you could put a few notes next to calculations that would be very helpful). Ive attached a copy of the moody diagram aswell as it is relevant.

Figure 6. The Moody Diagram
Friction Factor
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.015
0.01
Laminar Flow
64
Re
Material
Concrete, coarse
Concrete, new smooth
Drawn tubing
Glass,Plastic Perspex
Iron, cast
Sewers,old
ks (mm)
0.25
0.025
0.0025
0.0025
0.15
3.0
0.1
Steel, mortar lined.
Steel, rusted
0.5
Steel, structural or forged 0.025
Water mains, old
1.0
10³
104
Moody Diagram
Transition Region
Complete turbulence
Friction Factor =
AP
106
Reynolds Number, Re=
pVd
H
Smooth Pipe
10'
0.05
0.04
0.03
0.02
0.015
0.01
0.005
0.002
0.001
5x10-4
2x10-
10-4
5x107
Relative Pipe Roughness
10-5
5x10-6
10-6
108

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