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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 × 10^B/(T−C)

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