Title

Determination Of Radiative Fluxes In An Absorbing, Emitting, And Scattering Vapor Formed By Laser Irradiation

Title - Alternative

J. Heat Transf.-Trans. ASME

Abstract

A two-dimensional computer model is developed to determine the radiative heat flux distributions within the vapor formed above a metal target irradiated by a laser beam. An axisymmetric cylindrical enclosure containing a radiatively participating medium is considered. Scattering is assumed to be isotropic and allowances are made for variation of the radiative properties of the medium and boundaries. The P-1 and P-3 spherical harmonics approximations are used to solve the integro-differential radiative transfer equation. The resulting equations are then solved for the radial and axial heat fluxes using a finite-difference algorithm. The most significant factors affecting the results obtained from both the P-1 and P-3 approximations were the optical thickness of the medium and the type of laser profile incident upon the medium. Using different wall reflectivities and scattering albedos had a smaller effect. Changing the medium temperature had an insignificant effect as long as medium temperatures were below 20,000 K.

Publication Title

Journal of Heat Transfer-Transactions of the Asme

Volume

113

Issue/Number

4

Publication Date

1-1-1991

Document Type

Article

Language

English

First Page

939

Last Page

946

WOS Identifier

WOS:A1991HP76100021

ISSN

0022-1481

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