Computer Modeling of Particles Transport Stationary Process in Open Nanosystems

By far, the analysis of particles heat and mass transfer in open nanosystems is of noticeable importance both in theoretical and practical researches. Due to a slotted and cylindrical systems resort we have been able to carry out some essential experimental investigations as well as provide new theoretical computations. The distinctive feature of nanosystems gas particles transport research is connected with the fact that particles collisions with the walls of the nanosystems prevail over those in gas phase. The process of particle transport in such systems runs in a free-molecular regime. (Kn>>1). At this point the importance of the ratio between particles sizes and nanosystems geometry rises noticeably. The use of Boltzmann equation would not lead to a practical result in the analysis of gas transport in such systems due to the leap of particles gas density fluctuations as well as gas – surface nonequilibrium condition toughening. The work represents the analysis of neutral particles heat and mass transfer process in slotted and cylindrical open nanosystems by direct Monte-Carlo method in a free-molecular regime. Every computer experiment models over 10,000,000 particles trajectories, designates the flows of particles out of the systems in compliance with the sizes of the particles as well as dimensionless parameter r = U / kT the ratio of the particles cohesive energy with the walls of the systems U value and system temperature T alongside with systems geometry. The basis of the model used to describe the interaction of gas particles and systems walls surfaces refers to the assumption of the partial loss of the kinetic energy by the particles escaping out of condensed phase or system walls surface. The above energy amounts to a potential barrier U value and is spent on intermolecular gravity forces surmount.