Thermal Diffusion of Polyatomic Molecules

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Abstract
The transport properties of a multicomponent mixture of polyatomic gases in field‐free space and in a constant, static magnetic or electric field are discussed. The kinetic equations are developed in detail for binary mixtures of monatomic—diatomic and diatomic—diatomic gases, and these equations are solved using a rigid ellipsoid collision model. Calculated thermal‐diffusion factors are compared with experiment for several different isotopic mixtures of carbon monoxide.