Simple model of capillary condensation in cylindrical pores
Leszek Szybisz1,2 and Ignacio Urrutia1
1
Laboratorio TANDAR, Departamento de Física, Comisión Nacional de Energía Atómica,
Av. del Libertador 8250, RA-1429 Buenos Aires, Argentina.
2
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires,
Ciudad Universitaria, RA-1428 Buenos Aires, Argentina.
Abstract
A simple model based on an approximation of the droplet-like 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.
contact:<iurrutia@cnea.gov.ar>
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