
Accession Number : AD0701448
Title : THE FINITE CORRELATION RANGE OF THE NONEQUILIBRIUM PAIR DISTRIBUTION FUNCTION.
Descriptive Note : Final scientific rept.,
Corporate Author : AERONAUTICAL RESEARCH ASSOCIATES OF PRINCETON INC N J
Personal Author(s) : Sandri,Guido
Report Date : JAN 1970
Pagination or Media Count : 103
Abstract : The main conceptual features of the work can be summarized as follows. The twoparticle correlation function for systems which are not in thermodynamic equilibrium plays a central role in modern kinetic theory. The theoretical methods currently used to determine the correlation function essentially agree in leading order with Bogolubov's 'adiabatic' result. Bogolubov's theory yields a function with an infinite spatial range when the particle separation is parallel to the relative velocity. The paper shows, however, that a proper asymptotic treatment yields a nonadiabatic correlation function whose range is finite (of the order of the mean free path) even with the total neglect of threebody effects. This result demonstrates that the finite spatial range is due primarily to the statistical nature of the correlation function rather than due to threebody collisions. A method of expansion is then developed that yields a satisfactory lowestorder collision integral and correlation function, opening the possibility of calculating nonequilibrium phenomena beyond lowest order. (Author)
Descriptors : (*KINETIC THEORY, STATISTICAL FUNCTIONS), STATISTICAL MECHANICS, THERMODYNAMICS, NBODY PROBLEM, CORRELATION TECHNIQUES, INTERACTIONS, PERTURBATION THEORY, GASES, PLASMA MEDIUM, NUMERICAL ANALYSIS
Subject Categories : Thermodynamics
Distribution Statement : APPROVED FOR PUBLIC RELEASE