  The behavior of a confined spherical symmetric anomalous fluid under high
external pressure was studied with Molecular Dynamics simulations. The fluid is
modeled by a ore-softened potential with two characteristic length scales,
which in bulk reproduces the dynamical, thermodynamical and structural
anomalous behavior observed for water and other anomalous fluids. Our findings
show that this system has a superdiffusion regime for sufficient high pressure
and low temperature. As well, our results indicate hat this superdiffusive
regime is strongly related with the fluid structural properties and the
superdiffusion to diffusion transition is a first order phase transition. We
show how the simulation time and statistics are important to obtain the correct
dynamical behavior of the confined fluid. Our results are discussed in the
basis of the two length scales.
