An extension of the group contribution method for estimating thermodynamic and transport properties. Part III. Noble gases

2005 ◽  
Vol 22 (6) ◽  
pp. 949-959 ◽  
Author(s):  
Seung-Kyo Oh
Keyword(s):  
Transport Properties ◽  
Noble Gases ◽  
Group Contribution ◽  
Group Contribution Method ◽  
Thermodynamic And Transport Properties

scholarly journals Modified Lennard-Jones Potentials with a Reduced Temperature-Correction Parameter for Calculating Thermodynamic and Transport Properties: Noble Gases and Their Mixtures (He, Ne, Ar, Kr, and Xe)

2013 ◽  
Vol 2013 ◽  
pp. 1-29 ◽  
Author(s):  
Seung-Kyo Oh
Keyword(s):  
Transport Properties ◽  
Potential Function ◽  
Virial Coefficient ◽  
Noble Gases ◽  
Second Virial Coefficient ◽  
Temperature Correction ◽  
Viscosity Data ◽  
Lennard Jones ◽  
Thermodynamic And Transport Properties ◽  
Reduced Temperature

The three-parameter Lennard-Jones (12-6) potential function is proposed to calculate thermodynamic property (second virial coefficient) and transport properties (viscosity, thermal conductivity, and diffusion coefficient) of noble gases (He, Ne, Ar, Kr, and Xe) and their mixtures at low density. Empirical modification is made by introducing a reduced temperature-correction parameter τ to the Lennard-Jones potential function for this purpose. Potential parameters (σ, ε, and τ) are determined individually for each species when the second virial coefficient and viscosity data are fitted together within the experimental uncertainties. Calculated thermodynamic and transport properties are compared with experimental data by using a single set of parameters. The present study yields parameter sets that have more physical significance than those of second virial coefficient methods and is more discriminative than the existing transport property methods in most cases of pure gases and of gas mixtures. In particular, the proposed model is proved with better results than those of the two-parameter Lennard-Jones (12-6) potential, Kihara Potential with group contribution concepts, and other existing methods.

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