Journal of Chemical Physics
Lattice theory, Phase transformations (Statistical physics), Interfaces (Physical sciences)
We derive the phase diagrams and spinodals of binary liquid systems with anisotropic interactions, such as hydrogen-bonded molecules. The work is based on the four-particle cluster variation method, using a different potential for different contact points. It is shown that the introduction of a cluster larger than previously used by Barker and Fock, leads to a considerable improvement in the shape of the phase diagram and avoids some of the difficulties encountered in their calculation. Phase diagrams are displayed for various choices of the parameters: the number of contact points, the interaction potential, and the order of the approximation.
"Coexistence and spinodal curves in directionally bonded liquids using the four-cluster approximation," with P.H.E. Meijer, J. Chem. Phys. 80, 1617 (1984)