Abstract

The viscous drag (wall shear stress) and heat flux on the both cylinder walls, as well as flow macroscopic characteristics (velocity, density and temperature) are numerically studied in non-stationary Couette gas flow between rotating cylinders. The results are obtained using Direct Simulation Monte Carlo (DSMC) method and numerical solution of a continual model based on the Navier-Stokes-Fourier (NSF) method. Three typical cases are considered: A) inner rotating - outer stationary cylinder; B) inner stationary - outer rotating cylinder; C) opposite rotating cylinders. These studies have been accomplished for fixed Knudsen numbers. The NSF results have been obtained by setting a local value of Knudsen number in the corresponding first order slip boundary conditions. Capabilities applications of continual model are estimated for several Knudsen numbers.

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