ARGON
ARGON provides thermodynamic properties using the fundamental equation of state developed by C. Tegeler, R. Span, and W. Wagner, "Eine neue Fundamental-gleichung für das fluide Zustandsgebiet von Argon für Temperaturen von der Schmelzlinie bis 700 K und Drücke bis 1000 MPa", Fortschritt-Berichte VDI, Reihe 3: Verfahrenstechnik Nr. 480, as documement by Reiner Tillner-Roth, Fundamental Equations of State, Shaker Verlag, Aachen, 1998
This information is also available in:
Ch. Tegeler, R. Span, W. Wagner
A New Equation of State for Argon Covering the Fluid Region for Temperatures From the Melting Line to 700 K at Pressures up to 1000 MPa
J.Phys. Chem Ref. Data, 28(3) pp. 779-850 (1999)
The reference state for specific enthalpy and entropy are set to zero is 298.15 K and 191.1325 kPa. The reference state can be changed with the $REFEFERENCE directive. To change the reference state to be zero for saturated liquid at the normal boiling point, enter the following directive into the Equations window.
$REFERENCE Argon NBP
The transport properties are implemented with the equations provided in:
E.W. Lemmon and R.T. Jacobsen
"Viscosity and Thermal Conductivity Equations for Nitrogen, Oxygen, Argon, and Air",
International Journal of Thermophysics, Vol. 25, No. 1, January 2004, pp. 21-69
Surface tension data are provided using the information in:
Mulero, A., Cachadina, I, and Parra, M.
"Recommended Correlations for the Surface Tension of Common Fluids"
J.Phys. Chem Ref. Data, Vol. 41, No.4, 2012
The sublimation pressure curve (valid for temperatures between 20 K and 83.806) is determined from:
N.Fray, B.Schmitt,
"Sublimation of ices of astrophysical interest:A bibliographic review"
Planetary and Space Science,57, (2009) pp. 2053-2080
The melting pressure curve (valid for temperatures between 83.806 K and 344.7 K) is determined from:
Lide, D.R. and Kehiaian, H.V.,
CRC Handbook of Thermophysical and Thermochemical Data
CRC Press, 1994, ISBN 0-8493-0197-1, 5th printing