The optical path length approach to radiation heat transfer with isotropic scattering and gaseous absorption

The hemispherical total reflectance and transmittance for banded gaseous absorption and isotropic scattering are determined by the optical path length approach. The optical path length approach decouples the scattering and absorption so that any absorption can be evaluated once the path length distributions have been evaluated. The path length distributions are determined by numerical inversion of the Laplace transform and the exponential wide band model is employed to evaluate the absorption. The effects of scattering total optical depth, scattering albedo, pressure broadening parameter and gaseous optical depth on the scattering total band absorption properties are presented and discussed.