Viscosity of Nitrogen

The viscosity, η, of nitrogen is lower than that of oxygen, and therefore lower than that of air. The variations of viscosity with temperature in the case of nitrogen and air can be calculated from the formula of Sutherland:



in which C=110 for nitrogen and 114 for air.

According to C. J. Smith, the viscosity of air as experimentally determined at 15° C. is 1.799×10^-4, while the values for nitrogen are:

	0° C.	15° C.	100° C.
η×104	1.665	1.737	2.118

The interpolated value at 23° C. is 1.773×10^-4, while the experimental value obtained by Yen is 1.7665×10^-4.