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 ()   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 v-p scientific : Fluid viscosity tables.. Table of Fluid viscosities Engineering Toolbox : Kinematic Fluid viscosity tables.. Table of Fluid viscosities csgnet : Density & Fluid viscosity tables.. Table of Fluid viscosities l

Fluids Index