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Issue 39, 2015
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Mesoscopic modeling of structural and thermodynamic properties of fluids confined by rough surfaces

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Abstract

The interfacial and structural properties of fluids confined by surfaces of different geometries are studied at the mesoscopic scale using dissipative particle dynamics simulations in the grand canonical ensemble. The structure of the surfaces is modeled by a simple function, which allows us to simulate readily different types of surfaces through the choice of three parameters only. The fluids we have modeled are confined either by two smooth surfaces or by symmetrically and asymmetrically structured walls. We calculate structural and thermodynamic properties such as the density, temperature and pressure profiles, as well as the interfacial tension profiles for each case and find that a structural order–disorder phase transition occurs as the degree of surface roughness increases. However, the magnitude of the interfacial tension is insensitive to the structuring of the surfaces and depends solely on the magnitude of the solid–fluid interaction. These results are important for modern nanotechnology applications, such as in the enhanced recovery of oil, and in the design of porous materials with specifically tailored properties.

Graphical abstract: Mesoscopic modeling of structural and thermodynamic properties of fluids confined by rough surfaces

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Article information


Submitted
02 Jul 2015
Accepted
09 Sep 2015
First published
09 Sep 2015

Phys. Chem. Chem. Phys., 2015,17, 26403-26416
Article type
Paper
Author version available

Mesoscopic modeling of structural and thermodynamic properties of fluids confined by rough surfaces

K. A. Terrón-Mejía, R. López-Rendón and A. Gama Goicochea, Phys. Chem. Chem. Phys., 2015, 17, 26403
DOI: 10.1039/C5CP03823E

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