Accession Number : AD0479919

Title :   THERMAL CONDUCTANCES IN A COLLISIONLESS GAS BETWEEN COAXIAL CYLINDERS AND CONCENTRIC SPHERES.

Descriptive Note : Technical note,

Corporate Author : PRINCETON UNIV NJ GAS DYNAMICS LAB

Personal Author(s) : Wu, Yau

Report Date : NOV 1965

Pagination or Media Count : 17

Abstract : The thermal conductances in a collisionless gas between coaxial cylinders and concentric spheres have been obtained for arbitrary thermal accommodation coefficients. This exact theory is based on the general theory of thermal conductances of collisionless gas developed recently by Wu which has been established according to his revised theory of thermal transpiration. The classical theory of thermal conductance between coaxial cylinders by Knudsen and von Smoluchowski is only accurate to the first power of the temperature difference in which the velocity distribution in the system is assumed to be nearly Maxwellian. However, in the present paper, it is unnecessary to make this usual assumption and the exact theory has been established according to the revised theory of thermal transpiration. (Author)

Descriptors :   *GASES), (*THERMAL CONDUCTIVITY, SPHERES, CYLINDRICAL BODIES, TEMPERATURE, VELOCITY, EVAPOTRANSPIRATION, SCATTERING, MATHEMATICAL ANALYSIS, HEAT TRANSFER, COUETTE FLOW.

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE