Determination of radiative fluxes in an absorbing, emitting, and scattering vapor formed by laser irradiation

Journal Article · Thu Oct 31 23:00:00 EST 1991 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2911225· OSTI ID:7280922

Erpelding, P; Minardi, A; Bishop, P J ^[1]

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1. Univ. of Central Florida, Orlando (United States)

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.

• OSTI ID: 7280922
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 113:4; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
ABSORPTIVITY
COMPUTERIZED SIMULATION
ELEMENTS
EMISSIVITY
ENERGY TRANSFER
FLUIDS
FLUX DENSITY
GASES
HEAT TRANSFER
HEATING
LASER-RADIATION HEATING
METALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PLASMA HEATING
RADIANT FLUX DENSITY
RADIANT HEAT TRANSFER
REFRACTIVITY
SIMULATION
SURFACE PROPERTIES