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A corresponding states treatment of saturated density, surface tension and capillary constant of cryogenic liquids and refrigerants
Author(s) -
Srinivasan K.
Publication year - 1990
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450680321
Subject(s) - surface tension , thermodynamics , refrigerant , capillary action , constant (computer programming) , chemistry , absolute deviation , physics , mathematics , statistics , computer science , gas compressor , programming language
Using a new set of energy ( kT ) and length (σ) parameters, a corresponding states treatment is applied to the calculation of some thermophysical properties in a generalised non‐dimensional form. The saturated density is well represented by the following equation:\documentclass{article}\pagestyle{empty}\begin{document}$$ \rho _{lr}^* - \rho _{gr}^* = 1.1648\left({1 - T_r} \right) $$\end{document}for all the liquids studied here. The surface tension correlations are \documentclass{article}\pagestyle{empty}\begin{document}$ \gamma _r^* = 2.055\left({1.219 - T_r^*} \right)^{1.240} $\end{document} for cryogenic fluids and hydrocarbons and \documentclass{article}\pagestyle{empty}\begin{document}$ \gamma _r^* = 2.322\left({1.228 - T_r^* } \right)^{1.244}$\end{document} for refrigerants. An interpretation of the index in the density equation and the constants in the surface tension equations is given. Using these correlations, an equation is also proposed for the capillary constant.