Kihara potential

The Kihara potential was developed by Taro Kihara in 1951 (Ref. 1) and was inspired by the Lennard-Jones model. It is given by

$\Phi _{12}(\rho )=\Phi _{0}\left[{\frac {m}{n-m}}\left({\frac {\rho _{0}}{\rho }}\right)^{n}-{\frac {n}{n-m}}\left({\frac {\rho _{0}}{\rho }}\right)^{m}\right],~~~n>m>3.$

where $\Phi _{12}$ is the intermolecular pair potential, and $\rho$ is the intermolecular distance.

References

1. Taro Kihara "The Second Virial Coefficient of Non-Spherical Molecules", Journal of the Physical Society of Japan 6 pp. 289-296 (1951)
2. Taro Kihara "Virial Coefficients and Models of Molecules in Gases", Reviews of Modern Physics 25 pp. 831-843 (1953)
3. T. Kihara "Convex molecules in gaseous and crystalline states", Advances in Chemical Physics 5 pp. 147-188 (1963)
4. Carlos Vega and Santigo Lago "Improved perturbation theory of Kihara fluids", Chemical Physics Letters 185 pp. 516-521 (1991)
5. Carlos Vega, Santiago Lago, Enrique De Miguel, and Luis F. Rull "Liquid-vapor equilibria of linear Kihara molecules", Journal of Physical Chemistry 96 pp. 7431-7437 (1992)
6. L. G. MacDowell, B. Garzón, S. Calero, and S. Lago "Dynamical properties and transport coefficients of Kihara linear fluids", Journal of Chemical Physics 106 pp. 4753- (1997)
7. A. Cuetos, B. Martínez-Haya, S. Lago and L. F. Rull "Liquid crystal behavior of the Kihara fluid", Physical Review E 68 011704 (2003)