Title

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

Keywords

Laser processing; Materials processing and manufacturing processes; Radiation interactions

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-l andP-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-l 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. © 1991 by ASME.

Publication Date

1-1-1991

Publication Title

Journal of Heat Transfer

Volume

113

Issue

4

Number of Pages

939-945

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1115/1.2911225

Socpus ID

0012999445 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0012999445

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