Accomodational dependence of the heat- and mass-transfer processes in a multiatomic gas in a capillary with arbitrary knudsen numbers

TLDR: In this article, the authors considered the process of heat and mass transfer of a multiatomic gas in a cylindrical capillary due to the longitudinal pressure and temperature gradients with arbitrary Knudsen numbers.

Abstract: Processes of heat and mass transfer of a multiatomic gas in a cylindrical capillary due to the longitudinal pressure and temperature gradients are considered, with arbitrary Knudsen numbers. The problem is solved on the basis of a linearized kinetic equation with a model collisional term taking account of the excitation of rotational and vibrational degrees of freedom of the molecules. The contributions of internal degrees of freedom of the molecules to the thermal fluxes are analyzed. The dependence of these fluxes on the character of the interaction between the molecules and the channel surface is considered.