Density profile and order parameter of a hard ellipsoidal fluid confined to a slit

Abstract

The density profile and order parameter of a fluid of hard axially symmetric ellipsoidsconfined in between two parallel hard walls is obtained by using the density functionaltheory. The required input direct correlation function of the homogeneous fluid iscalculated by the variational method introduced by Marko (1989 Phys. Rev. 39 2050) andthe modified closest approach method proposed by Rickayzen (1998 Mol. Phys. 95 393).Here the restricted orientation model, ROM, is extended to study a fluid comprisingmolecules which can be aligned in more than six directions, making it more representativeof a normal fluid. The density profiles, the average number density and order parameterare obtained for different values of density and elongations. The results are inagreement with the previous theory and available Monte Carlo simulation results.