Accession Number : AD0469851

Title :   HEAT-TRANSFER AND SHEAR BETWEEN COAXIAL CYLINDERS FOR LARGE KNUDSEN NUMBERS.

Descriptive Note : Technical rept.,

Corporate Author : CALIFORNIA UNIV BERKELEY INST OF ENGINEERING RESEARCH

Personal Author(s) : Willis, D. Roger

Report Date : JUL 1965

Pagination or Media Count : 15

Abstract : The heat transfer between coaxial cylinders for large Knudsen number is obtained using the method of Knudsen iteration. The BGK model equation, together with an extension which allows the Prandtl number to be set arbitrarily, is used. Results are compared with those obtained by moment methods. It is found that the criterion proposed by Hurlbut (Phys. Fluids 7, 904, 1964) for validity of the free molecular results is reasonable. Results are also presented for the rotating cylinder problem in a high Knudsen number flow. (Author)

Descriptors :   (*CYLINDRICAL BODIES, HEAT TRANSFER), SHEAR STRESSES, RAREFIED GAS DYNAMICS, THEORY, MATHEMATICAL ANALYSIS, EQUATIONS, ITERATIONS, MATHEMATICAL MODELS, ROTATION.

Distribution Statement : APPROVED FOR PUBLIC RELEASE