Model for the atomic-scale structure of the homogeneous cooling state of granular fluids

It is proposed that the equilibrium generalized mean spherical model of fluid structure may be extended to nonequilibrium states with equation of state information used in equilibrium replaced by an exact condition on the two-body distribution function. The model is applied to the homogeneous cooling state of granular fluids, and upon comparison to molecular-dynamics simulations, is found to provide an accurate picture of the pair distribution function.