where r, is the pipe radius. Calculate the shear stress (a) at the centerline, (b) at r = 0.25 cm, and (c) at the wall, if water at 20°C is flowing and umar = 25 m/s. Density Density tap Density Specific Gravity Density Temp (°C) Specific Gravity 4°C reference pure pure pure water 60°F water ( g/em³ ) water water ( kg/m) ( g/cm' ) Ib/cu.ft reference O (solid) 0.915 0.9150 915.0 O liquid) 62.42 0.9999 999.9 0.99987 0.999 1.002 4 1.0000 1000 0.99999 62.42 1.000 1.001 20 0.9982 998.2 0.99823 62.28 0.998 0.999 40 0.9922 992.2 0.99225 61.92 0.992 0.993 60 0.9832 983.2 0.98389 61.39 0,983 0.985 80 0.9718 971.8 0.97487 60.65 0.972 0.973 Water Dynamic and Kinematic Viscosity Temperature Pressure Dynamie viscosity Kinematic viscosity (°C] [MPa] [Pa s), IN s/m2] (eP), [mPa s] Ibf s/ft *101 [m/s*10*), (eSt) 0.01 0.000612 0.0017914 1.79140 3.7414 1.7918 10 0.0012 0.0013060 1.30600 2.7276 1.3065 20 0.0023 0.0010016 1.00160 2.0919 1.0035 30 0.0042 0.0007972 0.79722 1.6650 0.8007 40 0.0074 0.0006527 0.65272 1.3632 0.6579
where r, is the pipe radius. Calculate the shear stress (a) at the centerline, (b) at r = 0.25 cm, and (c) at the wall, if water at 20°C is flowing and umar = 25 m/s. Density Density tap Density Specific Gravity Density Temp (°C) Specific Gravity 4°C reference pure pure pure water 60°F water ( g/em³ ) water water ( kg/m) ( g/cm' ) Ib/cu.ft reference O (solid) 0.915 0.9150 915.0 O liquid) 62.42 0.9999 999.9 0.99987 0.999 1.002 4 1.0000 1000 0.99999 62.42 1.000 1.001 20 0.9982 998.2 0.99823 62.28 0.998 0.999 40 0.9922 992.2 0.99225 61.92 0.992 0.993 60 0.9832 983.2 0.98389 61.39 0,983 0.985 80 0.9718 971.8 0.97487 60.65 0.972 0.973 Water Dynamic and Kinematic Viscosity Temperature Pressure Dynamie viscosity Kinematic viscosity (°C] [MPa] [Pa s), IN s/m2] (eP), [mPa s] Ibf s/ft *101 [m/s*10*), (eSt) 0.01 0.000612 0.0017914 1.79140 3.7414 1.7918 10 0.0012 0.0013060 1.30600 2.7276 1.3065 20 0.0023 0.0010016 1.00160 2.0919 1.0035 30 0.0042 0.0007972 0.79722 1.6650 0.8007 40 0.0074 0.0006527 0.65272 1.3632 0.6579
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
![1. The velocity distribution in a 3-cm diameter pipe is given by
where ro is the pipe radius. Calculate the shear stress (a) at the centerline, (b) at r = 0.25 cm, and
(c) at the wall, if water at 20°C is flowing and umax = 25 m/s.
Density
Density
tap
Density
Specific
Gravity
Specific
Gravity
4°C reference
Density
Temp
(°C)
pure
pure
pure water
water
60°F
water
(g/em' )
water
( kg/m)
(g/cm' )
Ib/cu.ft
reference
O (solid)
0.9150
915.0
0.915
O liquid)
0.9999
999.9
0.99987
62.42
0.999
1.002
4
1.0000
1000
0.99999
62.42
1.000
1.001
20
0.9982
998.2
0.99823
62.28
0.998
0.999
40
0.9922
992.2
0.99225
61.92
0.992
0.993
60
0.9832
983.2
0.98389
61.39
0.983
0.985
80
0.9718
971.8
0.97487
60.65
0.972
0.973
Water Dynamic and Kinematic Viscosity
Temperature
Pressure
Dynamic viscosity
Kinematic viscosity
(°C]
[MPa]
[Pa s], [N s/m2]
[eP], [mPa s]
lbf s/ft *10)
[m'/s*101, (eSt)
0.01
0.000612
0.0017914
1.79140
3.7414
1.7918
10
0.0012
0.0013060
1.30600
2.7276
1.3065
20
0.0023
0.0010016
1.00160
2.0919
1.0035
30
0.0042
0.0007972
0.79722
1.6650
0.8007
40
0.0074
0.0006527
0.65272
1.3632
0.6579](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Ffdbc9f68-da67-46ef-a520-9a5f891ed1a8%2F41e53b26-3d88-4041-996c-847dafab569c%2F7odjqo_processed.png&w=3840&q=75)
Transcribed Image Text:1. The velocity distribution in a 3-cm diameter pipe is given by
where ro is the pipe radius. Calculate the shear stress (a) at the centerline, (b) at r = 0.25 cm, and
(c) at the wall, if water at 20°C is flowing and umax = 25 m/s.
Density
Density
tap
Density
Specific
Gravity
Specific
Gravity
4°C reference
Density
Temp
(°C)
pure
pure
pure water
water
60°F
water
(g/em' )
water
( kg/m)
(g/cm' )
Ib/cu.ft
reference
O (solid)
0.9150
915.0
0.915
O liquid)
0.9999
999.9
0.99987
62.42
0.999
1.002
4
1.0000
1000
0.99999
62.42
1.000
1.001
20
0.9982
998.2
0.99823
62.28
0.998
0.999
40
0.9922
992.2
0.99225
61.92
0.992
0.993
60
0.9832
983.2
0.98389
61.39
0.983
0.985
80
0.9718
971.8
0.97487
60.65
0.972
0.973
Water Dynamic and Kinematic Viscosity
Temperature
Pressure
Dynamic viscosity
Kinematic viscosity
(°C]
[MPa]
[Pa s], [N s/m2]
[eP], [mPa s]
lbf s/ft *10)
[m'/s*101, (eSt)
0.01
0.000612
0.0017914
1.79140
3.7414
1.7918
10
0.0012
0.0013060
1.30600
2.7276
1.3065
20
0.0023
0.0010016
1.00160
2.0919
1.0035
30
0.0042
0.0007972
0.79722
1.6650
0.8007
40
0.0074
0.0006527
0.65272
1.3632
0.6579
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