On the Kinetic Theory of Dense Fluids. VII. The Doublet Distribution Function for Rigid Spheres with an Attractive Potential

Abstract

A new integro‐differential equation for the doublet distribution function of a model dense fluid is derived and solved. In this model, the intermolecular pair potential is represented as a rigid core plus an attraction. Interactions involving rigid cores are handled as in the theory of the dense rigid‐sphere fluid and attractive interactions are handled as in the Fokker‐Planck theory. The resultant doublet distribution function is compared with the singlet distribution function calculated for the same model.