Water-like Anomalies of Core-Softened Fluids: Dependence on the Trajectories in ($PρT$) Space

Details Water-like Anomalies of Core-Softened Fluids: Dependence on the Trajectories in ($PρT$) Space Water-like Anomalies of Core-Softened Fluids: Dependence on the Trajectories in ($PρT$) Space

2010-10-20

arxiv.org/abs/1010.4169v1

Physics

Condensed Matter

Soft Condensed Matter

10 pages, 10 Figs

Scientific paper

In the present article we carry out a molecular dynamics study of the core-softened system and show that the existence of the water-like anomalies in this system depends on the trajectory in $P-\rho-T$ space along which the behavior of the system is studied. For example, diffusion and structural anomalies are visible along isotherms, but disappears along the isochores and isobars, while density anomaly exists along isochors. We analyze the applicability of the Rosenfeld entropy scaling relations to this system in the regions with the water-like anomalies. It is shown that the validity of the of Rosenfeld scaling relation for the diffusion coefficient also depends on the trajectory in the $P-\rho-T$ space along which the kinetic coefficients and the excess entropy are calculated.

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