Numerical prediction of heat transfer by natural convection and radiation in an enclosure filled with an isotropic scattering medium

2012 ◽  
Vol 113 (13) ◽  
pp. 1689-1704 ◽  
Author(s):  
F. Moufekkir ◽  
M.A. Moussaoui ◽  
A. Mezrhab ◽  
H. Naji ◽  
D. Lemonnier
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Numerical Prediction ◽  
Isotropic Scattering ◽  
Scattering Medium

Scaling Anisotropic Scattering in Radiation Heat Transfer for a Planar Medium

1982 ◽  
Vol 104 (1) ◽  
pp. 68-75 ◽  
Author(s):  
H. Lee ◽  
R. O. Buckius
Keyword(s):  
Heat Transfer ◽  
Radiation Heat Transfer ◽  
Anisotropic Scattering ◽  
Isotropic Scattering ◽  
Scattering Medium ◽  
Radiation Heat ◽  
Scattering Problems ◽  
Solution Methods ◽  
The One ◽  
Planar Medium

Radiation heat transfer in a planar participating medium which scatters anisotropically is scaled to an isotropically scattering medium. Only isotropic scattering problems need to be solved with a scaled optical depth and albedo. The scaling is derived from approximate solution methods to the equation of transfer. From the P-1 approximation, the two-flux method, and the modified linear anisotropic scattering model, three scalings are derived. The scaling that gives the best results when comparing the scaled solutions to exact solutions is the one derived from the P-1 approximation.

Scale Modeling of Radiation in Enclosures With Absorbing/Emitting and Isotropically Scattering Media

1987 ◽  
Vol 109 (2) ◽  
pp. 470-477 ◽  
Author(s):  
Hsing-Pang Liu ◽  
J. R. Howell
Keyword(s):  
Heat Transfer ◽  
Factor Analysis ◽  
Optical Thickness ◽  
Energy Exchange ◽  
Isotropic Scattering ◽  
Scattering Medium ◽  
Scattering Media ◽  
Participating Media ◽  
Pure Radiation ◽  
Scale Modeling

Exchange factor analysis has been shown to be an alternative to zonal analysis in enclosures with participating media. An experimental measurement of exchange factors for a cubic enclosure has been done, and practical problems associated with the measurements are discussed. The effects of isotropic scattering and absorption-isotropic re-emission processes are known to be the same for their contribution to energy exchange paths in systems with equal optical thickness. The measurement of these exchange factors is achieved by using an enclosure containing a near-isotropically scattering medium. The heat transfer results for the pure radiation case are demonstrated by using these experimentally determined exchange factors in the analysis, and are compared with the analytical results.

Enhancement of Heat Transfer in Vertical Openended Channels in Natural Convection of Gas

2002 ◽  
Vol 33 (1-2) ◽  
pp. 5 ◽  
Author(s):  
Yu. F. Gortyshov ◽  
Igor A. Popov ◽  
V. V. Olimpiev ◽  
B. B. Kostylev
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Enhancement Of Heat Transfer
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