Thermal signatures of a localized inhomogeneity in a 2-D participating medium subjected to an ultra-fast step-pulse laser wave

Effects of the Incidence of a Gaussian Temporal Short-Pulse Laser of Different Spatial Profiles on a Two-Dimensional, Rectangular, Inhomogeneous Participating Medium

“…The time-marching and ray-tracing procedures have been given in previous studies [38] and are not repeated here.…”

“…Cases of both homogeneous [19][20][21][22][23][24][25][26][27][28][32][33][34] and inhomogeneous [8, 24-26, 29, 31, 36-38] media have been studied. Although most of the studies have focused on a simple one-timensional (1-D) planar geometry [14,19,21,22,25,28,[31][32][33][34][35]37], some studies have also been devoted to two-dimensional (2-D) [14,20,24,29,36,38] and three-dimensional (3-D) Cartesian geometries [26,30]. In these studies, various numerical radiative transfer methods, such as the spherical harmonics method (P N approximation), the discrete ordinates method, the discrete transfer method, the Monte Carlo method, the radiation element method, and the finite-volume method (FVM), have been employed.…”

“…Analyses of a shortpulse radiation in a 2-D rectangular geometry have been reported in [20,24,36,38]. The Monte Carlo method, the P-1 approximation, and the discrete ordinates method have been used in these studies, and the results were reported for a single-pulse diffuse or collimated radiation.…”

Comparison of the thermal effects of the transport of a short-pulse laser and a multi-pulse laser through a participating medium

“…In the literature [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30], a good amount of work has been reported on the analysis of transient radiative transfer in an optically participating medium. 1-D planar medium [11][12][13][14][15][16][17][18][19][20][21] as well as multi-dimensional [22][23][24][25][26][27][28][29][30] geometries, have been considered in the analysis. Cases of the incident radiation source having step [16,17,20,23] as well as Gaussian temporal profiles [11][12][13][14][15]…”

“…Study has also been reported with diffuse as well as collimated radiation sources. Different researchers have done the analysis using different numerical radiative transfer methods, viz., differential approximation [13], discrete ordinates method (DOM) [11,16,20,22,27,29], discrete transfer method (DTM) [16,18], finite element method [15], Monte Carlo method [24,26], radiation element method [14] and the finite volume method (FVM) [16,17,19,21,23].…”