Effects in the transition flow of rarefied gas
Y. M. Pechatnikov
Technical University, St. Petersburg, Russia
This paper is devoted to development of Probable Simulation Method for modeling rarefied gas flow in the transitional, from molecular to continuum, range through three-dimensional ducts and slits of any length. A theoretical discussion of the transition range between from molecular flow and laminar viscous flow is actually. The transition regime has always presented considerable theoretical difficulty since both the theoretical formalism employed and the physical processes occurring are so different for the two extremes. From the standpoint of modeling, Vacuum Gas Dynamics has been discussed as an isothermal subset of Rarefied Gas Dynamics in duct. Theoretical Probable approaches to gas flow through duct has been considered, with an emphasis on physical interpretation. It’s based on the assumptions of the kinetic theory of gases and new physical model of gas flow in transition range. As results, the Probable Simulation Method to gas flow has been developed. The flow of a gas through ducts of long and finite length has been investigated. The Probable Simulation Method was tested for similarity geometric components and was found to agree well with published results. The results have been discussed and verified. Effects in the transition flow of rarefied gas have been discussed.
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