Generalized direct-summation procedure for the thermal conductivity in moderately dense gases

Abstract

The direct-summation procedure of Bartis and Oppenheim is generalized for correlation- function expressions which contain N-particle dynamic fluxes of both momentum and spatial coordinates. The generalized procedure is used to evaluate the coefficient of thermal conductivity for moderately dense gases. A general expansion of the transport coefficient is formulated for all orders in the density while explicit expressions are given to first order in the density.