Growth of a dissipative universe and the limits of Newtonian cosmology

In closed model universes assumed to bounce at some minimum radius, dissipation causes the amplitude of the oscillations to grow. This well-known fact of relativistic cosmology is counterintuitive. Since Newtonian models correspond closely to relativistic ones when there is no dissipation, we examine dissipative Newtonian models, and note the peculiarly relativistic ideas which must be introduced to obtain correct results.