Phase transitions and ordering of confined dipolar fluids |
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Authors: | I Szalai and S Dietrich |
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Institution: | 1.Institute of Physics,University of Pannonia,Veszprém,Hungary;2.Max-Planck-Institut für Metallforschung,Stuttgart,Germany;3.Institut für Theoretische und Angewandte Physik,Universit?t Stuttgart,Stuttgart,Germany |
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Abstract: | We apply a modified mean-field density functional theory to determine the phase behavior of Stockmayer fluids in slit-like
pores formed by two walls with identical substrate potentials. Based on the Carnahan-Starling equation of state, a fundamental-measure
theory is employed to incorporate the effects of short-ranged hard-sphere-like correlations while the long-ranged contributions
to the fluid interaction potential are treated perturbatively. The liquid-vapor, ferromagnetic-liquid-vapor, and ferromagnetic-liquid-isotropic-liquid
first-order phase separations are investigated. The local orientational structure of the anisotropic and inhomogeneous ferromagnetic
liquid phase is also studied. We discuss how the phase diagrams are shifted and distorted upon varying the pore width. |
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Keywords: | PACS" target="_blank">PACS 61 20 Gy Theory and models of liquid structure 64 75 Gh Phase separation and segregation in model systems (hard spheres Lennard-Jones etc ) 64 70 Ja Liquid-liquid transitions 64 75 -g Phase equilibria |
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