A general purpose analytical expression for collision integrals, up to (l, s) = (4,4), of non-reactive interactions between heavy particles is proposed. The expression has been obtained from the classical cross section calculation for a model potential depending on few parameters, related directly to physical properties of the interacting particles. The fitting function has been verified in the temperature range 10^2 to 10^5 K making these collision integrals suitable for Chapman-Enskog calculations of complex mixtures in high enthalpy fluid dynamics. Parameter values for all the relevant interactions in I I species air model have been reported.

Classical transport collision integrals for a Lennard-Jones like phenomenological model potential

GORSE, Claudine;
2007-01-01

Abstract

A general purpose analytical expression for collision integrals, up to (l, s) = (4,4), of non-reactive interactions between heavy particles is proposed. The expression has been obtained from the classical cross section calculation for a model potential depending on few parameters, related directly to physical properties of the interacting particles. The fitting function has been verified in the temperature range 10^2 to 10^5 K making these collision integrals suitable for Chapman-Enskog calculations of complex mixtures in high enthalpy fluid dynamics. Parameter values for all the relevant interactions in I I species air model have been reported.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/15715
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