Alternative derivation of the free energy in the mean spherical approximation

1982 ◽  
Vol 76 (2) ◽  
pp. 1170-1172 ◽  
Author(s):  
Yaakov Rosenfeld
Keyword(s):  
Free Energy ◽  
Spherical Approximation ◽  
Mean Spherical Approximation ◽  
Alternative Derivation ◽  
The Mean

Some Explicit Results for the Mean Spherical Approximation for Mixtures of Yukawa Fluids

2008 ◽  
Vol 73 (3) ◽  
pp. 424-438 ◽  
Author(s):  
Douglas J. Henderson ◽  
Osvaldo H. Scalise
Keyword(s):  
Integral Equation ◽  
Spherical Approximation ◽  
Mean Spherical Approximation ◽  
Inverse Temperature ◽  
Temperature Expansion ◽  
Yukawa Fluid ◽  
The Mean ◽  
Full Solution ◽  
Insight Into ◽  
Reasonable Model

The mean spherical approximation (MSA) is of interest because it produces an integral equation that yields useful analytical results for a number of fluids. One such case is the Yukawa fluid, which is a reasonable model for a simple fluid. The original MSA solution for this fluid, due to Waisman, is analytic but not explicit. Ginoza has simplified this solution. However, Ginoza's result is not quite explicit. Some years ago, Henderson, Blum, and Noworyta obtained explicit results for the thermodynamic functions of a single-component Yukawa fluid that have proven useful. They expanded Ginoza's result in an inverse-temperature expansion. Even when this expansion is truncated at fifth, or even lower, order, this expansion is nearly as accurate as the full solution and provides insight into the form of the higher-order coefficients in this expansion. In this paper Ginoza's implicit result for the case of a rather special mixture of Yukawa fluids is considered. Explicit results are obtained, again using an inverse-temperature expansion. Numerical results are given for the coefficients in this expansion. Some thoughts concerning the generalization of these results to a general mixture of Yukawa fluids are presented.

Equation of state for a Yukawa fluid in the mean spherical approximation

1996 ◽  
Vol 104 (16) ◽  
pp. 6327-6329 ◽  
Author(s):  
J. H. Herrera ◽  
H. Ruiz‐Estrada ◽  
L. Blum
Keyword(s):  
Equation Of State ◽  
Spherical Approximation ◽  
Mean Spherical Approximation ◽  
Yukawa Fluid ◽  
The Mean
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