Multilayer approximation for a confined fluid in a slit pore

Autor:	Zarragoicoechea, G. J., Meyra, A. G., Kuz, V. A.
Rok vydání:	2010
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Soft Condensed Matter
Zdroj:	Pap. Phys. 2, 020002 (2010)
Druh dokumentu:	Working Paper
DOI:	10.4279/pip.020002
Popis:	A simple Lennard-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. Comment: 6 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1003.3187 Zobrazit plný text záznamu View this record from Arxiv