Articulo
Multilayer approximation for a confined fluid in a slit pore
Registro en:
issn:1852-4249
Autor
Zarragoicoechea, Guillermo Jorge
Meyra, Ariel Germán
Kuz, Victor Alfredo
Institución
Resumen
A simple Lemiard-Jones fluid confined in a slit nanopore with hard walls is studied on the basis of a multilayer structured model. Each layer is homogeneous and parallel to the walls of the pore. The Helmholtz energy of this system is constructed following van der Waals-like approximations, with the advantage that the model geometry permits to obtain analytical expressions for the integrals involved. Being the multilayer system in thermodynamic equilibrium, a system of non-linear equations is obtained for the densities and widths of the layers. A numerical solution of the equations gives the density profile and the longitudinal pressures. The results are compared with Monte Carlo simulations and with experimental data for Nitrogen, showing very good agreement. Instituto de Física de Líquidos y Sistemas Biológicos Comisión de Investigaciones Científicas de la provincia de Buenos Aires