Water - Density Viscosity Specific Weight

Thermodynamics | Engineering Physics
Engineering Hydraulics

The following is engineering properties of water

Dynamic viscosity of water

The dynamic viscosity of water is 8.90 × 10−4 Pa·s or 8.90 × 10−3 dyn·s/cm2 or 0.890 cP at about 25 °C.

Water has a viscosity of 0.0091 poise at 25 °C, or 1 centipoise at 20 °C.

As a function of temperature T (K): (Pa·s) = A × 10B/(TC)

where A=2.414 × 10−5 Pa·s ; B = 247.8 K ; and C = 140 K.Viscosity of liquid water at different temperatures up to the normal boiling point is listed below.

Temperature [°C]
Viscosity

[mPa·s]

10
1.308
20
1.002
30
0.7978
40
0.6531
50
0.5471
60
0.4658
70
0.4044
80
0.3550
90
0.3150
100
0.2822

Dynamic and Kinematic Viscosity of Water in Imperial Units (BG units):

Temperature
- t -
(°F)
Dynamic Viscosity
- µ -
(lb s/ft2) x 10-5
Kinematic Viscosity
-ν -
(ft2/s) x 10-5
32
3.732
1.924
40
3.228
1.664
50
2.730
1.407
60
2.344
1.210
70
2.034
1.052
80
1.791
0.926
90
1.500
0.823
100
1.423
0.738
120
1.164
0.607
140
0.974
0.511
160
0.832
0.439
180
0.721
0.383
200
0.634
0.339
212
0.589
0.317

Dynamic and Kinematic Viscosity of Water in SI Units:

Temperature
- t -
(°C)
Dynamic Viscosity
- µ -
(N s/m2) x 10-3
Kinematic Viscosity
-ν -
(m2/s) x 10-6
0
1.787
1.787
5
1.519
1.519
10
1.307
1.307
20
1.002
1.004
30
0.798
0.801
40
0.653
0.658
50
0.547
0.553
60
0.467
0.475
70
0.404
0.413
80
0.355
0.365
90
0.315
0.326
100
0.282
0.294
  • 1 N s/m2 = 1 Pa s = 10 poise = 1,000 milliPa s
  • 1 m2/s = 1 x 104 cm2/s =1 x 104 stokes = 1 x 106 centistokes

Density and Weight of Water at Known Temperature

Density and weight of water, at standard sea-level atmospheric pressure

Temperature
Density
Weight
°F/°C
grams/cm3
pounds/ft3
kilograms/liter
32°/0°
0.99987
62.416
0.999808
39.2°/4.0°
1.00000
62.424
0.999937
40°/4.4°
0.99999
62.423
0.999921
50°/10°
0.99975
62.408
0.999681
60°/15.6°
0.99907
62.366
0.999007
70°/21°
0.99802
62.300
0.997950
80°/26.7°
0.99669
62.217
0.996621
90°/32.2°
0.99510
62.118
0.995035
100°/37.8°
0.99318
61.998
0.993112
120°/48.9°
0.98870
61.719
0.988644
140°/60°
0.98338
61.386
0.983309
160°/71.1°
0.97729
61.006
0.977223
180°/82.2°
0.97056
60.586
0.970495
200°/93.3°
0.96333
60.135
0.963270
212°/100°
0.95865
59.843
0.958593

Heat of Vaporization of Water - Experimental Data from Dortmund Data Bank

Engineering Properties of Water

Property of Water
0° C
20° C
40° C
60° C
80° C
100° C
Units
Density
999.84
998.21
992.22
983.20
971.82
958.40
kg m-3
Thermal Expansion
-0.07
0.207
0.385
0.523
0.643
0.752
*10-3   K-1
Isothermal Compression
(Volume Viscosity)
5.0879
4.5895
4.4241
4.4507
4.6418
4.9015
*10-10   Pa-1
Dynamic Viscosity  
1.793
1.002
0.6532
0.4665
0.3544
0.2818
*10-3   kg m-1 s-1  (Pa s)
Kinematic Viscosity
1.787
1.004
0.658
0.475
0.365
0.294
*10-6   m2 s-1
Thermal Conductivity
561.0
598.4
630.5
654.3
670.0
679.1
*10-3   W m-1 K-1
Specific Heat
at constant pressure   Cp
4.2176
4.1818
4.1785
4.1843
4.1963
4.2159
*103    J kg-1 K-1
Specific Heat
at constant volume   Cv
 
 
 
 
 
 
*103    J kg-1 K-1
Specific Entropy   e
0
0.296
0.581
0.832
1.076
1.307
*103    J kg-1 K-1
Specific Enthalpy
0
83.8
167.6
251.5
335.3
419.1
*103    J kg-1
Saturation Vapor
Pressure
611.3
2,338.8
7,381.4
19,932
47,373
101,325
Pa
Surface Tension
75.64
72.75
69.60
66.24
62.47
58.91
*10-3   N m-1
Speed of Sound
1,403
1,481
1,526
1,552
1,555
1,543
m s-1


Pure water has it's highest density at 4.0°C  = 1000 kg/m3.
Freezing/Melting temperature = 0.00°C   (101,325 Pa)
Boiling/Condensing temperature = 100.00°C   (101,325 Pa)
Latent heat of melting = 334 kJ/kg
Latent heat of evaporation = 2,270 kJ/kg
Molar mass = 18.01528 g/mol

Viscosity of Liquid Water in the range -8°C to 150°C

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