Gas molecular viscosiy

Dear Jonathan Barnes:

Doing a search requiring viscosity and air and helium and hydrogen and gas and table

URL:

for $200, NIST will sell you a database

URL:

one for air only

URL:

single point values for some gases and liquids

Be sure and note the difference between viscosity and kinematic (or dynamic) viscosity.

appreciated

The search brought up little information about the "kinetic theory of gases", so you might want to search on that.

David A. Smith

If you are too cheap (or poor) to buy the NIST database mentioned in another reply, you can get the same data in a somewhat less user-friendly form in the NIST Chemistry Webbook:

"Thermophysical Properties of Fluid Systems".

Hydrogen and Helium are both on their fluid list. "Air" is not, but, depending on your needs, numbers for nitrogen might be good enough.

-------------------------------------------------------------- Dr. Allan H. Harvey, Boulder, CO "Any opinions expressed are mine, and should not be attributed to my employer, my wife, or my cats."

Hi,

for air viscosity refer to

K. Kadoya, N. Matsunaga, A. Nagashima: Viscosity and Thermal Conductivity of Dry Air in the Gaseous Phase, Journal of Physical and Chemical Reference Data Vol. 14 (1985), No. 4, pp. 947-970.

Frank

Jonathan Barnes schrieb:

Reid et al. "The Properties of Gases and Liquids" has theory, algorithms and recommendations.

You may take gasvis.for from

It requires other of the source files and only calculates Hydrogen and air, but does not include Helium.

Hi,

for air viscosity refer to

K. Kadoya, N. Matsunaga, A. Nagashima: Viscosity and Thermal Conductivity of Dry Air in the Gaseous Phase, Journal of Physical and Chemical Reference Data Vol. 14 (1985), No. 4, pp. 947-970.

Frank

Jonathan Barnes schrieb: