Analysis of the characteristics of time-resolved signals for transient radiative transfer in scattering participating media

作者：Ruan L M^*; Wang S G; Qi H; Wang D L

来源：Journal of Quantitative Spectroscopy and Radiative Transfer, 2010, 111(16): 2405-2414.

DOI：10.1016/j.jqsrt.2010.06.019

• Transient radiative transfer
• Short-pulse laser
• Dual-peak phenomenon
• Finite volume method

Transient radiative transfer (TRT) in one-dimensional (1-D) homogeneous and inhomogeneous media with ultra-short pulse laser irradiated is investigated by means of the finite volume method (FVM) in the present research. Comparing with the steady radiative transfer (SRT), the extra time-resolved information can be obtained in TRT. Meanwhile, the propagation speed of short-pulse laser and the geometric thickness of the media should be considered in the simulation of TRT problem besides the optical thickness. A new nondimensional number zeta=ct(P)/L is presented. For the homogeneous media, the temporal signals would overlap one another with different combinations of the pulse duration and the thickness of the media with the same zeta. Furthermore, in two-layer media, the influence of the scattering albedo, optical thickness and the geometric thickness of the participating media on 'dual-peak' are studied thoroughly. The improved expression of the 'local minimum' in the 'dual-peak' and the interface location of the multi-layer media are provided.

• 出版日期2010-11
• 单位哈尔滨工业大学