Rough Lennard-Jones molecules

A heuristic model for pseudospherical molecules is proposed. The model interaction consists of a simple Lennard-Jones potential with an added intermolecular torque which depends on the relative ‘surface velocity’ of colliding particles. Certain unphysical features of the related rough hard sphere model can be avoided in a natural way. Mean squared forces and mean squared torques may be calculated directly from the Lennard-Jones pair correlation function. Results of molecular dynamics calculations on 108-particle rough Lennard-Jones systems are presented.