title: Simple model of capillary condensation in cylindrical pores.
abstract: A simple model based on an approximation of the dropletlike model is formulated for studying adsorption of fluids into cylindrical pores. This model yields a nearly universal description of capillary condensation transitions for noble gases confined by alkali metals. The system's thermodynamical behavior is predicted from the values of two dimensionless parameters: D* (the reduced asymptotic strength of the fluid-adsorber interaction, a function of temperature) and R* (the reduced radius of the pore). The phenomenon of hysteresis inherently related to capillary condensation is discussed. The connection to a previously proposed universality for cylindrical pores is also established.
authors.affiliation: Laboratorio TANDAR, Departamento de Física, Comisión Nacional de Energía Atómica, Avenida del Libertador 8250, RA-1429 Buenos Aires, Argentina.
authors.forename: Leszek
authors.initials: L
authors.lastname: Szybisz
authors.forename: Ignacio
authors.initials: I
authors.lastname: Urrutia