Ein Stoffgruppenmodell für die Berechnung der Diffusion in polynÄren Gasgemischen

A component group model for a simplified calculation of diffusion in multicomponent gaseous mixtures is developed. It is assumed, that the components of the mixture may be classified into groups in such way, that the binary diffusion coefficients between components of a group and also the binary diffusion coefficients between components of different groups may be approximated by averages. The application of the component group model is demonstrated for the mixture of dissociated air and for a 14-component H-C-N-O mixture. For many technically important gaseous mixtures a model with two or three groups of components yields a sufficient accurate approximation.