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Viscosity of common gases

Viscosity of gases at atmospheric pressure from -150 to 600 celsius, among which air, nitrogen, oxygen, steam

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1. Variation of gas viscosity with temperature
2. Graph of viscosity changes with temperature for common gases
3. Data table : variation of gases viscosity as a function of temperature
4. Variation with pressure

1. Variation of gas viscosity with temperature

How does viscosity of gases vary with temperature ?

The viscosity of gases is, in general, increasing with temperature. The additional movement of the gas molecules is actually causing more contact, thus interaction in between molecules leading to an increase in viscosity.

This page is detailing the viscosity in between -150°c and +600°c for common gases : Oxygen, Air, Nitrogen, Carbon Dioxide, Steam, Hydrogen.

2. Graph of viscosity changes with temperature for common gases


Viscosity of some gases as function of temperature

3. Data table : variation of gases viscosity as a function of temperature


Viscosity in mPa.s or cP
Temperature in celsius Oxygen Air Nitrogen Carbon Dioxide Steam Water Hydrogen
-150 0.01 0.009 0.0086

0.0046
-100 0.0132 0.0121 0.0116 0.009
0.006
0 0.0192 0.0176 0.0168 0.0136 0.009 0.0083
100 0.0244 0.022 0.021 0.0183 0.0128 0.0104
200 0.029 0.026 0.0248 0.0224 0.0164 0.01202
300 0.0332 0.0298 0.028 0.0265 0.0202 0.014
400 0.037 0.033 0.0308 0.0302 0.024 0.0156
500 0.0404 0.036 0.0332 0.0338 0.0278 0.017
600 0.044 0.0388
0.037 0.0314 0.0184

Note : Approximate values

4. Variation with pressure

How does viscosity of gases vary with pressure ?

If the pressure increases, gases viscosity is usually increasing as well.