Monte Carlo prediction of radiative heat transfer in inhomogeneous, anisotropic, nongray media
Journal Article
·
· Journal of Thermophysics and Heat Transfer
A Monte Carlo solution technique has been formulated to predict the radiative heat transfer in three-dimensional, inhomogeneous participating media which exhibit spectrally dependent emission and absorption and anisotropic scattering. Details of the technique and selected numerical sensitivities are discussed. The technique was applied to a problem involving a medium composed of a gas mixture of carbon dioxide and nitrogen and suspended carbon particles. A homogeneous medium was modeled to examine the effect of total pressure and carbon-particle concentration on radiative heat transfer. Variation in total pressure, over the range studied, had minimal effect on the amount of heat radiated to the enclosure walls and on the radiative-flux distribution within the medium. Increases in the carbon particle concentration produced significantly higher heat fluxes at the boundaries and altered the radiative flux distribution. The technique was then applied to an inhomogeneous medium to examine effects of specific temperature and carbon particle concentration distributions on radiative heat transfer. For the inhomogeneous conditions examined, the largest radiative flux divergence occurs near the center of the medium and the regions near some enclosure walls act as energy sinks. 16 refs.
- Research Organization:
- National Aeronautics and Space Administration, Hampton, VA (United States). Langley Research Center
- OSTI ID:
- 45865
- Journal Information:
- Journal of Thermophysics and Heat Transfer, Journal Name: Journal of Thermophysics and Heat Transfer Journal Issue: 1 Vol. 8; ISSN 0887-8722; ISSN JTHTEO
- Country of Publication:
- United States
- Language:
- English
Similar Records
An n-bounce method for analysis of radiative transfer in enclosures with anisotropically scattering media
Radiative transfer through an inhomogeneous fly-ash cloud; Effects of temperature and wavelength dependent optical properties
Nongray radiative gas analyses using the S-N discrete ordinates method
Journal Article
·
Thu Aug 01 00:00:00 EDT 1991
· Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)
·
OSTI ID:5568544
Radiative transfer through an inhomogeneous fly-ash cloud; Effects of temperature and wavelength dependent optical properties
Journal Article
·
Tue Dec 31 23:00:00 EST 1991
· Numerical Heat Transfer. Part A, Applications; (United States)
·
OSTI ID:5271650
Nongray radiative gas analyses using the S-N discrete ordinates method
Journal Article
·
Thu Oct 31 23:00:00 EST 1991
· Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)
·
OSTI ID:7281142