Molecular Dynamic Simulation of the Fluid Concentration Fluctuations in Two Dimensional Porous Medium

The filtration of fluid in 2D porous medium is simulated by the molecular dynamics technique. The high concentration of fluid is created at the initial point in time and the number of fluid particles is investigated in all porous. The concentration of particles pores and parameters of interaction potentials is varied. In all cases the particles concentration decay is well described by exponential functions. The decreasing of the interpore channels leads to the increasing of the relaxation time and does not depend on the system size. This phenomenon is observed in real filtration processes. In recent years, much attention has been devoted to the problem of description the non-stationary filtration in porous mezo and macro structures [1, 2]. In this paper the evolution of density fluctuations is considered by the molecular dynamics simulation [3, 4]. The density of particles is related by fluid or gas pressure in modeling 2D porous media. The particles of solid state porous matrix interacting each other by means of Lennard and Jones potential