Fluids confined in wedges and by edges: From cluster integrals to thermodynamic properties referred to different regions

• Autores: Urrutia, Ignacio
• Año de publicación: 2015
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: CLUSTER INTEGRALS; CONFINED FLUIDS; EDGES ANS WEDGES; COLLOIDS
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

Recently, new insights into the relation between the geometry of the vessel that confines a fluid and its thermodynamic properties were traced through the study of cluster integrals for inhomogeneous fluids. In this work, I analyze the thermodynamic properties of fluids confined in wedges or by edges, emphasizing on the question of the region to which these properties refer. In this context, the relations between the line-thermodynamic properties referred to different regions are derived as analytic functions of the dihedral angle α, for 0 < α < 2π, which enables a unified approach to both edges and wedges. As a simple application of these results, I analyze the properties of the confined gas in the low-density regime. Finally, using recent analytic results for the second cluster integral of the confined hard sphere fluid, the low density behavior of the line thermodynamic properties is analytically studied up to order two in the density for 0 < α < 2π and by adopting different reference regions.
Fil: Urrutia, Ignacio. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina