Mathematics
Scientific paper
May 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jchph..88.5840m&link_type=abstract
Journal of Chemical Physics (ISSN 0021-9606), vol. 88, May 1, 1988, p. 5840-5845.
Mathematics
1
Gas Density, Gas Mixtures, Operators (Mathematics), Thermal Diffusion, Chapman-Enskog Theory, Ion Distribution, Mathematical Models, Planetary Atmospheres, Spheres, Stellar Atmospheres
Scientific paper
It is shown that, expressed in terms of the inverse of the Enskog collision operator, the Stefan-Maxwell equations in a multicomponent dense gas of rigid spheres take a form quite similar to that obtained in gases at moderate pressure. Two thermal diffusion factors are defined. The first is a 'kinetic' thermal diffusion factor formally identical with the factors found by kinetic theory at moderate pressures. The second is a 'phenomenological' thermal diffusion factor which is rather more pressure dependent. A brief comparison with experiment shows that the Enskog dense gas theory works best in systems rich in helium at elevated temperature.
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