Accession Number : AD0479658


Title :   THE BHATNAGAR-GROSS-KROOK EQUATION AS AN APPROXIMATION OF THE BOLTZMANN EQUATION.


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 : FEB 1966


Pagination or Media Count : 15


Abstract : The collision factor in the Bhatnagar-Gross-Krook equation, the B-G-K equation, is evaluated in comparison with the collision integral in the Boltzmann equation. The deviation of the B-G-K collision factor from the Boltzmann collision integral increases as the Knudsen number increases and the deviation of the state of a gas from thermal equilibrium becomes significant. An attempt is made to rationalize the status of the B-G-K equation as a physical law. (Author)


Descriptors :   , (*KINETIC THEORY, STATISTICAL FUNCTIONS), STATISTICAL MECHANICS, ITERATIONS, PARTIAL DIFFERENTIAL EQUATIONS, KNUDSEN NUMBER, INTEGRAL EQUATIONS, GAS FLOW, APPROXIMATION(MATHEMATICS).


Subject Categories : PHYSICAL CHEMISTRY
      FLUID MECHANICS


Distribution Statement : APPROVED FOR PUBLIC RELEASE