Transient Prediction of Radiation Response in a 3-D Scattering-Absorbing Medium Subjected to a Collimated Short Square Pulse Train

Abstract

Transient radiative transfer characteristics in a three-dimensional scattering-absorbing medium subjected to collimated irradiation of a short pulse train were investigated. A basic problem in which a cube is exposed to collimated irradiation of a single unit step square pulse was solved via the transient discrete-ordinates method, and Duhamel's superposition theorem was used to construct the responses of various pulse trains. The effects of optical thickness, scattering albedo, pulse width, and pulse train interval between two successive pulses on the temporal profiles of divergence of radiative heat flux, reflectance, and transmittance were scrutinized.