Accession Number:

AD0658209

Title:

ON GREY ABSORPTION COEFFICIENTS IN RADIATIVE TRANSFER.

Descriptive Note:

Scientific interim rept.,

Corporate Author:

MARTIN CO BALTIMORE MD RESEARCH INST FOR ADVANCED STUDIES

Personal Author(s):

Report Date:

1967-08-01

Pagination or Media Count:

65.0

Abstract:

The radiative heat flux and several frequency averaged absorption coefficients were calculated for a plane-parallel radiating gas slab, for a variety of absorption spectra. Both constant temperature and constant temperature gradient are considered. None of the assumptions concerning these coefficients of several recent non-grey models turn out to be verifiable, except at best under more restrictive conditions. With constant temperature, the heat flux is to a good approximation the same function of a single optical depth as in a grey gas. With variable temperature a radiative transfer equation with a common coefficient for both emission and absorption terms becomes meaningless, a separate coefficient should be used for the absorption term. Author

Subject Categories:

  • Physical Chemistry
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE