A simplified perturbation theory for equilibrium properties of triangular-well fluids

A simple expression for the first coordination shell of the radial distribu tion function of the reference hard-sphere fluid is used in combination wit h Barker-Henderson perturbation theory to obtain the thermodynamic properti es of triangular-well fluids. These properties are expressed analytically i n terms of density, temperature, and range of the potential. It is found th at the results are accurate for a wide range of densities and temperatures in comparison with existing simulation data. (C) 2000 Elsevier Science B.V. All rights reserved.