Projecte de final de màster realitzat en col.laboració amb el Departament de Física Fonamental, Facultat de Física.

Using molecular dynamics we simulate a system of particles interacting through a continuous isotropic pairwise coresoftened potential, proposed by Giancarlo Franzese, consisting on a repulsive shoulder and an attractive well. The model is known to display a phase diagram with three fuid phases with a gas-liquid critical point and liquid-liquid critical point and to present density, diffusion and structural anomalies, in the same hierarchy that characterizes water. In this work we increase systematically the slope of the repulsive shouder to study the effect on the anomalies. We find that the different anomalous regions are sensible to the changes and get narrow as the slope increases. While diffusion and density anomalous regions tend to colapse into one single point in the T − ρ plane, structural anomalous region tends asimptotically to a fixed value.