Two mapping techniques for calculating radiative heat transfer with scattering

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5885125

Gu, W. C.A.; Murata, K. K.

The problem of radiative heat transfer through a gray, emitting, absorbing, and scattering medium with uniform optical properties is reduced to one without scattering through two techniques. One uses scaling laws, and the other uses a self-consistent effective gas temperature. The scaling laws are derived via the P/sub 1/ approximation to the radiative transfer equation and can be applied to multidimensional problems with nonisothermal media. The effective temperature method is presently restricted to isotropic scattering and isothermal media. Both methods are evaluated in the current study as a function of scattering albedo, wall emissivity, and optical thickness for two different geometries, and two sets of wall and gas temperatures. The effects of scattering anisotropy are also assessed for the P/sub 1/ method. The numerical results show that for these cases the scaling method is reasonably accurate for optically thick media with a scattering albedo less than 0.8, and the effective temperature technique is reasonably accurate for optically thin media for all albedos. 10 refs., 8 figs., 2 tabs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5885125
• Report Number(s): SAND-89-0326C; CONF-890819-11; ON: DE89010436
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ABSORPTION
DATA
ENERGY TRANSFER
EQUATIONS
FLUX DENSITY
HEAT TRANSFER
INFORMATION
MATHEMATICAL MODELS
NUMERICAL DATA
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIANT FLUX DENSITY
RADIANT HEAT TRANSFER
SCALING LAWS
SCATTERING
THEORETICAL DATA