Accession Number : AD0281753

Title :   CALCULATIONS OF COLLISION INTEGRALS IN THE MOMENT EQUATIONS,

Corporate Author : MARBURG UNIV (GERMANY)

Personal Author(s) : Suchy,Kurt

Report Date : DEC 1961

Pagination or Media Count : 37

Abstract : For the calculation of the collision integrals in the moment equations Weitzsch's ansatz is made for the velocity distribution functions being represented as integral superposition of Gaussian distributions. Its weighting function must contain a finite number of velocity independent parameters for the treatment of problems with strong deviations from equilibrium. For weak deviations a series expansion yields Grad's expansion of the distribution function in tensorial Hermite polynomials. The moment equations with their collision integrals are established up to the third order and the transport cross sections occurring therein are calculated for inverse power interaction potentials. (Author)

Descriptors :   *GASES, *KINETIC THEORY, *RAREFIED GAS DYNAMICS, *THERMODYNAMICS, FUNCTIONS(MATHEMATICS), INTEGRALS, TENSOR ANALYSIS, VECTOR ANALYSIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE