Diffusion baroeffect in a capillary in a broad range of knudsen numbers

Abstract

The magnitude of the diffusion baroeffect in a capillary is calculated in the entire range of Knudsen numbers based on a solution of BGK equations for a binary gas equation. The theoretical magnitudes of the baroeffect agree well with the experimental results obtained in a broad range of Knudsen numbers. The thermodynamic coefficients are calculated, and the Onsager reciprocal relation is demonstrated, from which in the limit of a viscous system it follows that the barodiffusion constant is equal to the coefficient of diffusion slippage.