The Free Expansion of Har d Sphere Confined Fluid Using DDFT

Confin ed systems have attracted a great deal of attention during the past years because of their interesting a nd different behavior from the b ulk. One of the theoretical approaches to study these syste ms is classical density functional theory (DFT) which is a rem arkably successful theory for describing the behavior of th e equilibrium structure of homogeneous and inh omogeneous fluids. Moreover, in the recent years the off equilibrium properties of such systems hav e represented a very active field of research. The extension of this framework to dynamical situations has m otivated very recently a large nu mber of studies that resulted in the for mulation of dynamic density functional theory (DDFT) [۱]. We are able to investigate a large variety of phenomena in various different fields using DDFT [۲]. In this work, the relaxation of hard sphere confined fluid in a nanoslit pore has been studied using dynamical density functional theory.