Widom-Rowlinson model

The Widom-Rowlinson model (Ref. 1) for mixtures takes the form:

$\mathrm{\Phi }(r_{ij})=0$; if $i$ and $j$ are particles of the same species

$\mathrm{\Phi }(r_{ij})={\mathrm{\Phi }}_{HS}(r_{ij});$ if $i$ and $j$ belong to different species,

where ${\mathrm{\Phi }}_{HS}(r)$ is the hard sphere intermolecular pair potential.

Surface tension

• E. de Miguel, N. G. Almarza and G. Jackson "Surface tension of the Widom-Rowlinson model", Journal of Chemical Physics 127 034707 (2007)

References

1. B. Widom and J. S. Rowlinson, "New Model for the Study of Liquid–Vapor Phase Transitions", J. Chem. Phys. 52, pp. 1670-1684 (1970)