Relationship between thermodynamic perturbation and scaled particle theories for fused dimers fluids

Various approaches are reviewed that use scaled particle theories to describe dumbbell fluids made of tangent or overlapped hard spheres. Expressions encountered in the literature written a form similar presented thermodynamic perturbation theory introduced by Wertheim for chains and developed statistical associating fluid (SAFT). Analogies differences observed these two types theoretical descriptions allow one propose alternative expressions with overlapping