Accession Number : AD0616285

Title :   THEORIES OF THERMAL TRANSPIRATION AND MOLECULAR EFFUSION,

Corporate Author : PRINCETON UNIV N J GAS DYNAMICS LAB

Personal Author(s) : Wu,Yau

Report Date : FEB 1965

Pagination or Media Count : 29

Abstract : Revised theories of thermal transpiration and molecular effusion are presented in a rigorous treatment. It is a modified version of the classical laws of Reynolds and Graham. A set of invariants and a new geometrical property (Isotropicity) are found in a system with nonuniform temperature distribution on the boundary in the Knudsen regime. The reciprocal transmission probability theorem is proved to be valid in this stationary state system according to the invariant of number flux throughout the region. (Author)

Descriptors :   (*GAS FLOW, THEORY), (*RAREFIED GAS DYNAMICS, THEORY), (*THERMODYNAMICS, GAS FLOW), MOLECULAR PROPERTIES, REYNOLDS NUMBER, INTEGRAL EQUATIONS, PARTIAL DIFFERENTIAL EQUATIONS, MOTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE