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Fluids Index

Viscosities of Various Fluids

Notes:
The values identified below are for dynamic viscosity as measured using centiPoise (cP) and SI units N.s m -2. = Pa. s
1 Centipoise = 1 mPa s (milliPascal Second)= 10 -3 Pa.s
1 Pa.s = 1000 centiPoise

The information has been obtained from reference texts and the internet.    A number of values have been obtained using nonograms provided in Perrys and by taking values from graphs of fluid properties.     The values are therefore only to be used for initial estimates.    Please use quality information sources for detail design work.

It should be noted that the viscosity is not a nice convenient fixed property of a fluid but it is affected very much by the ambient conditions of temperature and pressure and material parameters such and density, and chemical make-up.

1) A table of fluid (gas) viscosities using cP at room temperatures is provided and also a table of Pa.s values at various temperatures is also provided.
2) A table of fluid (liquid viscosities using cP at room temperatures is provided and also a table of Pa.s values at various temperatures is also provided.



Table of dynamic gas viscosity values in cP at room temperatures (20 deg C) and atmospheric pressure


Fluid Dynamic
viscosity
cP(Centipoise)
Acetylene 0,00935
Ammonia 0,00918
Argon 0,021
Carbon Dioxide 0,014
Carbon Monoxide 0,0166
Chlorine 0,0129
Cyanogen 0,00928
Ethylene 0,0097
Helium 0,0186
Hydrogen 0,00835
Hydrogen Chloride 0,0138
Hydrogen Sulphide 0,0117
Methane 0,0103
Nitric Oxide 0,0178
Nitrous Oxide 0,0135
Oxygen 0,0192
Sulphur Dioxide 0,0117




Dynamic viscosities (Pa.s) of various gases at different temperatures at atmospheric pressure

Example value Air (0 deg C) dynamic viscosity = 17 X 10 -6 Pa.s = 0,017 cPoise

Gas Symbol Temperature (Deg. C)
0 100 250 500
Viscosity Pa s ( Actual x 106 )
Oxygen O2 19 24 30 39
Helium He 18 22 28 37
Air - 17 21 27 35
Nitrogen N2 16,5 21 265 35
Carbon Monoxide CO 16,5 21 26 35
Carbon Dioxide CO2 13,7 18 24 34
Sulphur Dioxide SO2 11.8 15 20 28
Ammonia NH3 9,5 13 18 27
Hydrogen H2 85 10,5 12,5 16,5
Ethane C2H6 8,5 11,5 15,5 22,5
Propane C3H8 7,7 10 13,2 18
Butane C4H20 8 10,5 14,2 20


Dynamic Viscosities of Various liquids at room Temperature (20 degres C)


Fluid Dynamic
viscosity
cP(Centipoise)
Acetic Acid 1,219
Acetone 0,324
Benzene 0,647
Bromine 0.993
Carbon Disulphide 0,375
Carbon Tetrachloride 0.972
Chloroform 0,569
Glycerol 1495
Mercury Hg 1,552
Methyl Alcohol 0,594
Nitrobenzene 2,03
Olive Oil 84000
Lubricating Oil 799,4
Paraffin Oil 1000
Phenol 12,74
Toluene 0,585
Turpentine 1,49
Water 1


Dynamic Viscosities (Pa.s) of Various Liquids at different temperatures


Example value Water (20 deg C) dynamic viscosity = 0,001 Pa.s = 1 cPoise

Liquid.......... Chemical
symbol		 Temperature (Deg. C)
-25 0 20 50 100 200
Viscosity centiPoise (cP) (val's x 10-3 = Pa.s )
Water H20 - 1,7918 1,0028 0,5471 0,2817 0,1346
Light Machinery Oil - - - - 28 4,9 -
Spindle Oil - - - 13 5,49 2,0 -
Ethanol C2H5OH 3,241 1,786 1,201 0,701 0,326 -
Methanol CH3OH - 0,817 0,584 0,396 - -
Benzene C6H6 - - 0,649 0,436 0,261 0,113
Toluene C7H8 - 0,773 0,586 0,419 0,269 0,133
Sulphur Dioxide SO2 - 0,368 0,304 0,234 - -
Ammonia NH3 0,215 0,169 0,138 0,103 - -
Freon 113 - 1,4 0.92 0,75 0,5 0,29 -
Fuel Oil (sg=0.94) - - - 1000 100 11 2,5
Crude Oil (sg = 0,855) - - 16 7,5 4 2,5 1,5
Kerosene - - 3,7 2,5 1,4 0,6 -
Sulphuric Acid (100%)   90 36 25 10,5 3,4 -
Sulphuric Acid (60%)   16 9 6 3,5 1,5 -
Nitric Acid (95%)   2,1 1,5 1,2 0,85 0,50 -
Nitric Acid (60%)   6,0 3,5 2,5 1,4 0,7 -
Mercury   2 1,60 1,55 1,5 1,45 1,1




Useful Links
  1. v-p scientific : Fluid viscosity tables.. Table of Fluid viscosities
  2. Engineering Toolbox : Kinematic Fluid viscosity tables.. Table of Fluid viscosities
  3. csgnet : Density & Fluid viscosity tables.. Table of Fluid viscosities
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Last Updated 28/01/2013