Diffusion in helium-noble gas mixtures

A.S.M. Wahby, M. Abdel-Rahman and J. Los

Physica A: Statistical Mechanics and its Applications, 1982, vol. 112, issue 1, 214-224

Abstract: Diffusion coefficients have been measured of almost Lorentzian binary mixtures of He and the noble gases Ne, Ar, Kr and Xe. Measurements have been performed in the temperature range from 237 K to 420 K. The agreement with other experimental data is very satisfactory. A comparison with experimental thermal diffusion data on the same mixtures shows that the relation for Lorentzian mixtures. αL=2−∂ In D12∂ In Tp is quite accurate for the heavier helium-noble gas mixtures. Comparison of the experimentally determined function 2−∂ In D12∂ In Tp with theoretical calculations for several model potentials shows a semi-quantitative agreement between theory and experiment. The experimental curves indicate a great similarity between the interaction potentials of helium with the different noble gas atoms.

Date: 1982
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:112:y:1982:i:1:p:214-224

DOI: 10.1016/0378-4371(82)90215-1

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