  We have investigated the motion characteristics of a movable piston immersed
in a one dimensional gas of hard rods by event-oriented molecular dynamics in
the absence of thermal noise. Periodic and reflecting boundary conditions are
explored. It is shown that the piston undergoes systematic oscillations with
decaying amplitudes in short times before it comes to global thermodynamic
equilibrium. Moreover, the diffusion of the piston is explored and analytical
expressions for its equilibrium mean-squared displacement is obtained. It is
shown that MSD of the piston does not differ much from the normal rods despite
its mass and length are significantly larger.
