  We study dynamic two-body correlation functions, i.e. the two-body density,
the current-density correlator or van Hove current, and the current-current
correlator in Brownian dynamics computer simulations of a dense Lennard-Jones
bulk liquid. The dynamic decay of the correlation shells of the two-body
density is examined in detail. Inner correlation shells decay faster than outer
correlation shells, whereas outer correlation shells remain stable for
increasing times. Within a dynamic test particle picture the mechanism is
assumed to be triggered by the dislocation of the self particle, which releases
the confinement of the surrounding correlation shells. We present a division of
the van Hove current into an adiabatic and a superadiabatic contribution. The
magnitude of the adiabatic van Hove current is found to exceed that of the
total van Hove current, which is consistent with dynamic density functional
theory overestimating the speed of the dynamics. The direction of the
superadiabatic van Hove current opposes that of the total van Hove current. The
current-current correlator reveals detailed insight in the collisions of the
particles. We find a large static nearest-neighbor peak, which results from
colliding particles and different dynamic peaks, that are attributed to
consecutive collisions.
