Accession Number : AD0657795

Title :   THEORY OF GAS-SURFACE COLLISIONS,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE FLUID DYNAMICS RESEARCH LAB

Personal Author(s) : Trilling,Leon

Report Date : DEC 1966

Pagination or Media Count : 39

Abstract : A theory of gas surface interaction should predict the distribution of molecules re-emitted from a surface in function of the properties of the incident flux and the physics of the surface. It depends on our uncertain knowledge of free-bound heterogeneous molecule interactions and our equally uncertain knowledge of atomic lattice dynamics. The paper critically summarizes and compares with experimental results an increasingly detailed lattice model which gives plausible energy exchange predictions and a geometrical (hard cube) model which shows promise as a correlator of data on scattering direction distribution. Both these models are based on classical interaction mechanisms; some potential generalizations to quantum models are suggested. (Author)

Descriptors :   (*GASES, *STATISTICAL MECHANICS), CRYSTAL LATTICES, SURFACES, INTERACTIONS, QUANTUM STATISTICS, MOLECULAR ENERGY LEVELS

Subject Categories : Aerodynamics
      Fluid Mechanics
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE