ABSTRACT

An acoustic Greenspan viscometer was used to measure the kinematic viscosity and speed of sound in the gases: CO, CO2, SiF4, SF6, C4F8, and NH3. The measurements cover the temperature range 220 K to 375 K, and pressures up to 3.4 MPa or 80% of the saturation pressure. The viscometer was calibrated at 298.16 K using five reference gases, Ar, He, N2, CH4, and C3H8, for which the viscosity and the speed of sound are known. With this calibration, we estimated the relative standard uncertainty of the kinematic viscosity ur(g/q) = 0.006 and the uncertainty of speed of sound ur(c) = 0.0001, except for very low pressures where the signal-to-noise ratio deteriorates and quality factor for the Helmholtz mode is 620.

Compounds

#	Formula	Name
1	CO	carbon monoxide
2	CO2	carbon dioxide
3	F4Si	silicon tetrafluoride
4	F6S	sulfur hexafluoride
5	C4F8	octafluorocyclobutane
6	H3N	ammonia

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1	Kinematic viscosity, m2/s ; Gas	Temperature, K; Gas Pressure, kPa; Gas		Gas	double Helmholtz acoustic resonator	95
POMD	1	Speed of sound, m/s ; Gas	Temperature, K; Gas Pressure, kPa; Gas		Gas	double Helmholtz acoustic resonator	95
POMD	2	Kinematic viscosity, m2/s ; Gas	Temperature, K; Gas Pressure, kPa; Gas		Gas	double Helmholtz acoustic resonator	123
POMD	2	Speed of sound, m/s ; Gas	Temperature, K; Gas Pressure, kPa; Gas		Gas	double Helmholtz acoustic resonator	123
POMD	3	Kinematic viscosity, m2/s ; Gas	Temperature, K; Gas Pressure, kPa; Gas		Gas	double Helmholtz acoustic resonator	77
POMD	3	Speed of sound, m/s ; Gas	Temperature, K; Gas Pressure, kPa; Gas		Gas	double Helmholtz acoustic resonator	77
POMD	4	Kinematic viscosity, m2/s ; Gas	Pressure, kPa; Gas	Temperature, K; Gas	Gas	double Helmholtz acoustic resonator	8
POMD	4	Speed of sound, m/s ; Gas	Pressure, kPa; Gas	Temperature, K; Gas	Gas	double Helmholtz acoustic resonator	8
POMD	5	Kinematic viscosity, m2/s ; Gas	Temperature, K; Gas Pressure, kPa; Gas		Gas	double Helmholtz acoustic resonator	56
POMD	5	Speed of sound, m/s ; Gas	Temperature, K; Gas Pressure, kPa; Gas		Gas	double Helmholtz acoustic resonator	56
POMD	6	Kinematic viscosity, m2/s ; Gas	Temperature, K; Gas Pressure, kPa; Gas		Gas	double Helmholtz acoustic resonator	71
POMD	6	Speed of sound, m/s ; Gas	Temperature, K; Gas Pressure, kPa; Gas		Gas	double Helmholtz acoustic resonator	71

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Kinematic viscosity and speed of sound in gaseous CO, CO2, SiF4, SF6, C4F8, and NH3 from 220 K to 375 K and pressures up to 3.4 MPa

Estrada-Alexanders, A. F.[Andres F.], Hurly, J. J.[John J.]

ABSTRACT