An Insight Into The Modeling of Short-Pulse Laser Transport Through A Participating Medium

Singh, Rajpreet; Mishra, Subhash C.; Roy, Nilanjan; Shekhawat, Nakul; Mitra, Kunal

doi:10.1080/10407790701443909

Cited by 8 publications

(4 citation statements)

References 34 publications

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“…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.…”

Section: Introductionmentioning

confidence: 99%

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

Muthukumaran

Mishra

2008

Numerical Heat Transfer, Part A: Applications

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This article deals with the effects of a short-pulse laser of Gaussian temporal and different spatial profiles on the signals emanating from a two-dimensional rectangular participating medium containing localized inhomogeneities. An incident short-pulse laser of Gaussian temporal profile has spatial loading on the south boundary either as a Gaussian or as a step function. The absorbing and scattering participating medium consists of a localized circular or elliptical inhomogeneity. The extinction coefficient of the inhomogeneity is the same as the containing medium, while its scattering albedo is different. Transmittance and reflectance signals are analyzed for the effects of the extinction coefficient and the spatial profile of the incident short-pulse laser. Spatial distributions of the signals along the boundaries and temporal evolution of the heat flux distributions inside the medium are also studied. The problem is analyzed using the finite-volume method.

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Section: Introductionmentioning

confidence: 99%

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

Muthukumaran

Mishra

2008

Numerical Heat Transfer, Part A: Applications

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“…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]18,19,21,22,[24][25][26][27][28][29][30] have been considered. Study has also been reported with diffuse as well as collimated radiation sources.…”

Section: Introductionmentioning

confidence: 99%

“…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].…”

Section: Introductionmentioning

confidence: 99%

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

Mishra

Muthukumaran

Maruyama

2012

International Journal of Heat and Mass Transfer

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“…The problem of a transient radiative transfer has been addressed in numerous investigations, especially in the last decade [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. However, only few of these studies were concerned with biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

Absorption of Short-Pulsed Laser Radiation in Superficial Human Tissues: Transient vs Quasi-Steady Radiative Transfer

Randrianalisoa

Dombrovsky

Lipínski

et al. 2014

Proceedings of the 15th International Heat Transfer Conference

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Transient radiative transfer effects are pertinent to thermal treatment of superficial cancer via short-pulsed laser irradiation. The transient effects become particularly important due to relatively strong scattering and long attenuation path of radiation in human tissues in the therapeutic window until the complete absorption. Our analysis is based on transport approximation for scattering phase function and the Monte Carlo method for radiative transfer. One-dimensional radiative transfer problem is considered, which was proved to be applicable for simulation of heat transfer and thermal destruction of tumors in superficial human tissues in the case of indirect heating strategy. A series of Monte Carlo calculations enables us to find the threshold of the steady-state approach applicability. In the biomedical problem under consideration, the steady-state solution for absorbed radiation power is sufficiently accurate at duration of laser pulse more than about 10 ps. The calculations for human tissues with embedded gold nanoshells, which are used to increase the local volumetric absorption of the radiation, showed that overheating of the nanoshells with respect to the ambient biological tissue is strongly dependent of the laser pulse duration. This effect is quantified for short pulses by solving the unsteady radiative transfer problem.

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An Insight Into The Modeling of Short-Pulse Laser Transport Through A Participating Medium

Cited by 8 publications

References 34 publications

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

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

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

Absorption of Short-Pulsed Laser Radiation in Superficial Human Tissues: Transient vs Quasi-Steady Radiative Transfer

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