Effect of Scattering on Unsteady Radiative Heat Transfer

Abstract

Theoretical investigation is made on the effect of the isotropic scattering on an unsteady radiative heat transfer through an absorbing, emitting and scattering medium in a semi-infinite space bounded by a semitransparent plate. The system is initially in a uniform state. At an instance the temperature of the plate is changed to a constant value in addition to the impose of a beam radiation through the plate. They are maintained hereafter. It is found out that the effect of the scattering is practically regarded as a similarity effect, in which the standard length scale is chosen the inverse of the extinction coefficient, when the albedo of scattering is 0∼0.8.