
Accession Number : AD0484001
Title : THE BHATNAGARGROSSKROOK EQUATION AS AN APPROXIMATION OF THE BOLTZMANN EQUATION. PART II  COMPARATIVELY FEASIBLE APPLICATIONS.
Descriptive Note : Interim rept.,
Corporate Author : POLYTECHNIC INST OF BROOKLYN NY DEPT OF AEROSPACE ENGINEERING AND APPLIED MEC HANICS
Personal Author(s) : Koga, Toyoki
Report Date : APR 1966
Pagination or Media Count : 12
Abstract : In a case of rarefied gas dynamics, where the collision effect is a minor perturbation factor in the result, the BGK equation may be a moderate approximation of the Boltzmann equation if we treat the equation properly by paying attention to the following: Since the collision factor is minor in the equation the zeroth approximation of the solution is obtained by solving the Boltzmann equation without the collision integral; it depends predominantly on the initial and boundary conditions, and may deviate considerably from the Maxwell distribution function. (Author)
Descriptors : (*KINETIC THEORY, PARTIAL DIFFERENTIAL EQUATIONS), (*RAREFIED GAS DYNAMICS, KINETIC THEORY), APPROXIMATION(MATHEMATICS), GASES, STATISTICAL MECHANICS, STATISTICAL FUNCTIONS, COUETTE FLOW, CHARGED PARTICLES, MAGNETIC FIELDS.
Subject Categories : Thermodynamics
Distribution Statement : APPROVED FOR PUBLIC RELEASE