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. (C) 2007 Elsevier B.V. All rights reserved.
Classical transport collision integrals for a Lennard-Jones like phenomenological model potential / Laricchiuta, A; Colonna, G; Bruno, D; Celiberto, Roberto; Gorse, C; Pirani, F; Capitelli, M.. - In: CHEMICAL PHYSICS LETTERS. - ISSN 0009-2614. - 445:4-6(2007), pp. 133-139. [10.1016/j.cplett.2007.07.097]
Classical transport collision integrals for a Lennard-Jones like phenomenological model potential
CELIBERTO, Roberto;
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. (C) 2007 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
