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	Volume 1, Issue 3 Pg 233 - 342 (October 2007)
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JP Journal of Heat and Mass Transfer

approximation is presented to accurately predict radiative heat flux and its related quantities such as emittances and reflectances of anisotropically scattering media. In this method, the second order Legendre expansion coefficient of the radiant intensity,

appearing in

equations is approximated by the zeroth order one,

in form of

Here, K denotes a correction factor and is determined so as to reproduce the hemispherical emittances of isothermal, gray, Henyey-Greenstein’s scattering media bounded by a black surface. A value of K thus determined changes variously with the optical thickness