RT Journal Article
T1 Local density approach for modeling fluids with density-dependent interactions
A1 García Almarza, Noé
A1 Lomba, Enrique
A1 Ruiz, G.
A1 Fernández Tejero, Carlos
AB In a recent paper [Phys. Rev. Lett. 86, 2038 (2001)] a simple fluid with a particular density-dependent pair potential was shown to exhibit, together with the vapor-liquid transition, a liquid-liquid phase separation and it was evidenced that, in order to adequately define the correct boundaries of stability, a simulation procedure based on the use of local densities had to be devised. It was found that for certain thermodynamic states the potential drives the system toward a phase separation that is otherwise frustrated by the change in the interactions induced by density fluctuations. Therefore, when integral equations or global density simulations are used, the critical points estimated from the thermodynamics are not associated with divergent correlations and vice versa. Here, we will explore in depth this fluid and introduce a detailed account of the proposed local density simulation technique. The results presented bear general significance for density-dependent potentials, like those of liquid metals or charge-stabilized colloids.
PB American Physical Society
SN 1539-3755
YR 2003
FD 2003-02
LK https://hdl.handle.net/20.500.14352/50898
UL https://hdl.handle.net/20.500.14352/50898
LA eng
NO ©2003 The American Physical Society. The authors acknowledge financial support from the Dirección General de Enseñanza Superior e Investigación Científica (DGESCYT) under Grant Nos. PB 98-0673-C02-02 and BFM-2001-1017-C03 (E.L., G.R., and C.F.T.).
NO Dirección General de Enseñanza Superior e Investigación Científica (DGESCYT)
DS Docta Complutense
RD 10 abr 2025