Discrete-ordinates solution of short-pulsed laser transport in two-dimensional turbid media

• Published in: Applied optics (2004) Vol. 40; no. 19; p. 3156
• Main Authors: Guo, Z, Kumar, S
• Format: Journal Article
• Language: English
• Published: United States 01.07.2001
• ISSN: 1559-128X
• DOI: 10.1364/ao.40.003156

The discrete-ordinates method is formulated to solve transient radiative transfer with the incorporation of a transient term in the transfer equation in two-dimensional rectangular enclosures containing absorbing, emitting, and anisotropically scattering media subject to diffuse and/or collimated laser irradiation. The governing equations resulting from the discrete-ordinates discretization of the angular directions are further discretized in the spatial and the temporal domains by the finite-volume approach. The current formulation is suitable for solving transient laser transport in turbid media as well as for steady-state radiative transfer in many engineering problems. The method is applied to several example problems and compared with existing steady-state solutions and Monte Carlo transient solutions. Good agreement is found in all cases. Short-pulsed laser interaction and propagation in a turbid medium with high scattering albedo are studied. The imaging of an inhomogeneous zone inside a turbid medium is demonstrated.