The outflow of gas mixture into vacuum, periodically interrupted by bodies moving towards the jet

The problem about the unsteady outflow of a mixture of gases into a vacuum, periodically interrupted by bodies moving toward the jet, was studied. This problem was considered as a possible gas separation technique. The unsteady flow of the gas mixture was simulated using the event-driven molecular dynamics (EDMD) approach under the following conditions: (1) moving boundaries, (2) a wide range of Knudsen number, (3) a wide range of Mach number, (4) violation of equilibrium between rotational and translational degrees of freedom. The problem of periodically interrupted flow was solved as close to reality as possible, taking into account the finite gap between the stator and the moving runner blades. The dependences of the molar fraction and flow rate of the resulting mixture on the system parameters were obtained. As a result, a number of practically important rec-ommendations for the design of such systems have been formulated.

Automated summary

This study examined the problem of unsteady outflow of a mixture of gases into a vacuum, which is periodically interrupted by the movement of objects towards the jet. The study investigated this problem as a potential gas separation technique. The unsteady flow of the gas mixture was simulated using the event-driven molecular dynamics approach, considering moving boundaries, a wide range of Knudsen numbers, a wide range of Mach numbers, and the violation of equilibrium between rotational and translational degrees of freedom. The problem of periodically interrupted flow was solved taking into account the finite gap between the stator and the moving runner blades. The study obtained the dependencies of the molar fraction and flow rate of the resulting mixture on the system parameters, and provided practical recommendations for the design of such systems.