We have studied the mutual dynamics of pairs of atoms in a dense Lennard-Jones fluid by evaluating relative velocity autocorrelation functions for particle pairs with separation r0 in a given distance range a0⩽r0⩽b0 at time using computer simulation. By application of projection operator...

The generalized time-dependent pair distribution function G2(R, R'; t) is examined for the first time by two molecular dynamics experiments in Lennard-Jones argon at room temperature and different densities. This function gives insight into the relative motion of atoms and plays an important...