Approximate non-conformal potential

The Approximate non-conformal potential (ANC) is given by (Eq 2.16 in ):

$\Phi _{12}(z)=\epsilon \left[{\frac {1-a}{(z^{3}/S+1-1/S)^{1/3}-a}}\right]^{12}-2\epsilon \left[{\frac {1-a}{(z^{3}/S+1-1/S)^{1/3}-a}}\right]^{6}$

where

• $z:=r/r_{m}$
• $a$ is the hard-core diameter in units of $r_{m}$
• $\epsilon$ is the well depth
• $S$ is a softness parameter

Second virial coefficient

The second virial coefficient is given in .

References

Related reading

• Fernando del Río, Jesús Eloy Ramos, Alejandro Gil-Villegas, and Ian A. McLure "Collision Diameters, Interaction Potentials, and Virial Coefficients of Small Quasi-Spherical Molecules", Journal of Physical Chemistry B 100 9104-9115 (1996)
• Fernando del Río and Jesús Eloy Ramos "Nonconformal Potentials and Second Virial Coefficients in Molecular Fluids. 1. Theory", Journal of Physical Chemistry B 102 pp. 10568-10575 (1998)
• Orlando Guzmán and Fernando del Río "Theoretical Equation of State of Dense Nonconformal Fluids from Effective Potentials. 1. Applications to Model Systems", Journal of Physical Chemistry B 105 pp. 8220-8229 (2001)
• Jesús Eloy Ramos "Viscosity and thermal conductivity from non-conformal potentials. I Theory and application to noble gases", Molecular Physics 103 pp. 2323-2334 (2005)
• P. Orea, A. Romero-Martínez, E. Basurto, C. A. Varga and G. Odriozola "Corresponding states law for a generalized Lennard-Jones potential", Journal of Chemical Physics 143 024504 (2015)
• M. Fuentes-Herrera, J. A. Moreno-Razo, O. Guzmán, J. López-Lemus and B. Ibarra-Tandi "Separating the effects of repulsive and attractive forces on the phase diagram, interfacial, and critical properties of simple fluids", Journal of Chemical Physics 144 214502 (2016)