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BasicPropertiesOfH2HeAir

In the previous chapters refrence was made to some essential properties of hydrogen, helium, frequently used as a safe model fluid, and air into which both gases are dispersed.

propertyH2Heair
density (at NTP 1 atm, 20C) 0.0835 kg/m^3 0.166 kg/m^3 1.21 kg/m^3
kinematic viscosity 1.05 10^{-4} m^2/s 1.15 10^{-4} m^2/s 1.51 10^{-4} m^2/s
diffusion coefficient 6.1 10^{-5} m^2/s 5.7 10^{-5} m^2/s ... m^2/s
diffusion coefficient in air 7.5 10^{-5} m^2/s ... 10^{-5} m^2/s ... m^2/s
sonic speed (at 1 atm, 20C) 1306 m/s 1005 m/s 300 m/s
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Page last modified on September 16, 2008, at 10:56 AM