Equivalent isotropic scattering formulation for transient short-pulse radiative transfer in anisotropic scattering planar media

Zhixiong Guo, Sunil Kumar

Research output: Contribution to journalArticle

Abstract

An isotropic scaling formulation is evaluated for transient radiative transfer in a one-dimensional planar slab subject to collimated and/or diffuse irradiation. The Monte Carlo method is used to implement the equivalent scattering and exact simulations of the transient short-pulse radiation transport through forward and backward anisotropic scattering planar media. The scaled equivalent isotropic scattering results are compared with predictions of anisotropic scattering in various problems. It is found that the equivalent isotropic scaling law is not appropriate for backward-scattering media in transient radiative transfer. Even for an optically diffuse medium, the differences in temporal transmittance and reflectance profiles between predictions of backward anisotropic scattering and equivalent isotropic scattering are large. Additionally, for both forward and backward anisotropic scattering media, the transient equivalent isotropic results are strongly affected by the change of photon flight time, owing to the change of flight direction associated with the isotropic scaling technique.

Original languageEnglish (US)
Pages (from-to)4411-4417
Number of pages7
JournalApplied Optics
Volume39
Issue number24
StatePublished - Aug 20 2000

Fingerprint

Radiative transfer
radiative transfer
Scattering
formulations
pulses
scattering
scaling
flight time
radiation transport
Scaling laws
predictions
scaling laws
Monte Carlo method
transmittance
slabs
Monte Carlo methods
Photons
flight
Irradiation
reflectance

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Equivalent isotropic scattering formulation for transient short-pulse radiative transfer in anisotropic scattering planar media. / Guo, Zhixiong; Kumar, Sunil.

In: Applied Optics, Vol. 39, No. 24, 20.08.2000, p. 4411-4417.

Research output: Contribution to journalArticle

@article{892ea4c1aa5d42ceb52db3ddae4ef55f,
title = "Equivalent isotropic scattering formulation for transient short-pulse radiative transfer in anisotropic scattering planar media",
abstract = "An isotropic scaling formulation is evaluated for transient radiative transfer in a one-dimensional planar slab subject to collimated and/or diffuse irradiation. The Monte Carlo method is used to implement the equivalent scattering and exact simulations of the transient short-pulse radiation transport through forward and backward anisotropic scattering planar media. The scaled equivalent isotropic scattering results are compared with predictions of anisotropic scattering in various problems. It is found that the equivalent isotropic scaling law is not appropriate for backward-scattering media in transient radiative transfer. Even for an optically diffuse medium, the differences in temporal transmittance and reflectance profiles between predictions of backward anisotropic scattering and equivalent isotropic scattering are large. Additionally, for both forward and backward anisotropic scattering media, the transient equivalent isotropic results are strongly affected by the change of photon flight time, owing to the change of flight direction associated with the isotropic scaling technique.",
author = "Zhixiong Guo and Sunil Kumar",
year = "2000",
month = "8",
day = "20",
language = "English (US)",
volume = "39",
pages = "4411--4417",
journal = "Applied Optics",
issn = "0003-6935",
publisher = "The Optical Society",
number = "24",

}

TY - JOUR

T1 - Equivalent isotropic scattering formulation for transient short-pulse radiative transfer in anisotropic scattering planar media

AU - Guo, Zhixiong

AU - Kumar, Sunil

PY - 2000/8/20

Y1 - 2000/8/20

N2 - An isotropic scaling formulation is evaluated for transient radiative transfer in a one-dimensional planar slab subject to collimated and/or diffuse irradiation. The Monte Carlo method is used to implement the equivalent scattering and exact simulations of the transient short-pulse radiation transport through forward and backward anisotropic scattering planar media. The scaled equivalent isotropic scattering results are compared with predictions of anisotropic scattering in various problems. It is found that the equivalent isotropic scaling law is not appropriate for backward-scattering media in transient radiative transfer. Even for an optically diffuse medium, the differences in temporal transmittance and reflectance profiles between predictions of backward anisotropic scattering and equivalent isotropic scattering are large. Additionally, for both forward and backward anisotropic scattering media, the transient equivalent isotropic results are strongly affected by the change of photon flight time, owing to the change of flight direction associated with the isotropic scaling technique.

AB - An isotropic scaling formulation is evaluated for transient radiative transfer in a one-dimensional planar slab subject to collimated and/or diffuse irradiation. The Monte Carlo method is used to implement the equivalent scattering and exact simulations of the transient short-pulse radiation transport through forward and backward anisotropic scattering planar media. The scaled equivalent isotropic scattering results are compared with predictions of anisotropic scattering in various problems. It is found that the equivalent isotropic scaling law is not appropriate for backward-scattering media in transient radiative transfer. Even for an optically diffuse medium, the differences in temporal transmittance and reflectance profiles between predictions of backward anisotropic scattering and equivalent isotropic scattering are large. Additionally, for both forward and backward anisotropic scattering media, the transient equivalent isotropic results are strongly affected by the change of photon flight time, owing to the change of flight direction associated with the isotropic scaling technique.

UR - http://www.scopus.com/inward/record.url?scp=0000078558&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000078558&partnerID=8YFLogxK

M3 - Article

VL - 39

SP - 4411

EP - 4417

JO - Applied Optics

JF - Applied Optics

SN - 0003-6935

IS - 24

ER -