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

    Authors

    P. Erpelding; A. Minardi;P. J. Bishop

    Comments

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    Abbreviated Journal Title

    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.

    Journal 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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