The Viscosity of Seven Gases Measured with a Greenspan Viscometer
John J. Hurly, Keith A. Gillis, J B. Mehl, Michael R. Moldover
We determined the viscosity of seven gases (Ar, CH4, C3H8, N2, SF6, CF4, C2F6) by interpreting frequency-response data from a Greenspan acoustic viscometer with a detailed model developed by Gillis, Mehl, and Moldover. The model contains a parameter er that characterizes the viscous dissipation at the ends of the viscometer s duct. It was difficult to determine er accurately from dimensional measurements; therefore, we adjusted er to fit the viscosity of helium on the isotherm 298 K (0.6 MPa
, Gillis, K.
, Mehl, J.
and Moldover, M.
The Viscosity of Seven Gases Measured with a Greenspan Viscometer, International Journal of Thermophysics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=830829
(Accessed October 22, 2021)