Accession Number : AD0673826

Title :   APPLICATION OF THE BHATNAGAR-GROSS-KROOK MODEL--A CAUTIONARY EXAMPLE,

Corporate Author : RAND CORP SANTA MONICA CALIF

Personal Author(s) : Willis,D. Roger

Report Date : AUG 1968

Pagination or Media Count : 11

Abstract : The nearly free molecular drag of a highly cooled blunt body in a hypersonic stream is predicted using the method of Knudsen iteration. The simple BGK model is used for the collisions. The predicted drag coefficient differs substantially from that reported previously. The main cause of this disagreement is thought to be a lack of validity of the simple BGK model for a highly nonequilibrium flow. (Author)

Descriptors :   (*REENTRY VEHICLES, PLASMA SHEATHS), (*BLUNT BODIES, HYPERSONIC CHARACTERISTICS), MOLECULES, SYMPOSIA, GAS FLOW, THREE DIMENSIONAL FLOW, COOLING, SPECIAL FUNCTIONS(MATHEMATICAL), MATHEMATICAL MODELS, STATISTICAL DISTRIBUTIONS, MATHEMATICAL PREDICTION, ITERATIONS, CORRELATION TECHNIQUES

Subject Categories : Statistics and Probability
      Fluid Mechanics
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE