Ultrafast Radiative Heat Transfer in Three-Dimensional Highly-Scattering Media Subjected to Pulse Train Irradiation

Transient Radiative Transfer in a Graded Index Medium with Specularly Reflecting Surfaces

“…Lu and Hsu [31,32] developed a reverse Monte Carlo (RMC) method, which shortened the computation time and improved the computational efficiency in the investigation of TRT. Akamatsu and Guo [33] applied the DOM coupled with superposition method to TRT in 3-D highly scattered media NOMENCLATURE a anisotropic factor c 0 light speed in vacuum, ms À1 G incident radiation, Wm À2 H(t) Heaviside step function I radiation intensity, Wm À2 sr À1 L medium thickness in direction z, m m 0 discrete time steps of the incident pulse M number of the sublayers of the medium n refractive index N total number of the simulated bundles q radiative heat flux, Wm À2 subjected to a time-dependent pulse train and investigated the magnitude of the superposition effect. Liu and Hsu [34,35] extended the application of discontinuous finite element method (DFEM) to solve the TRT in participating media using the time shift and superposition (TSS) principle for improving computational efficiency.…”

Ultrafast Laser Pulse Train Radiation Transfer in a Scattering-Absorbing 3d Medium With an Inhomogeneity

“…Duhamel's superposition theorem was fi rst introduced into the analysis of radiation transfer by Guo and Kumar (2002) to analyze the pulse feature of ultrafast radiative transfer, in which a basic solution to pulse irradiation was fi rst estimated and then the superposition law was used to construct the responses of various pulses. Later, the DOM and Duhamel's superposition theorem were applied by Akamatsu and Guo (2011) to scrutinize the transient characteristics of ultrafast radiative heat transfer in a homogeneous participating medium subjected to a diffuse short square pulse train. The transient characteristics of ultrafast laser radiative transfer in a homogeneous participating medium subjected to collimated irradiation of various square pulse trains by the DOM and Duhamel's superposition theorem were clarifi ed by Akamatsu and Guo (2013b).…”

Improved Treatment of Anisotropic Scattering for Ultrafast Radiative Transfer Analysis

“…Further, Das et al [22] compared DOM predictions of ultrafast laser propagation through tissue phantoms with experimental results, finding accurate agreement. Akamatsu and Guo [23] analyzed ultrafast radiative transfer in a highly scattering 3D medium subjected to pulse-train irradiation, following the superposition treatment introduced by Guo and Kumar [20]. It is worthy of mentioning the discovery of ray effect and false scattering with DOM by Chai et al [24].…”