NDLI: The effect of flux density on the formation of temperature field in alumina under conditions of heating by concentrated laser radiation

Content Provider	Springer Nature Link
Author	Bityukov, V. K. Petrov, V. A. Smirv, I. V.
Copyright Year	2009
Abstract	A numerical investigation is performed of the effect of the density of a flux of heating concentrated radiation of CO2 laser on the formation of temperature field in the process of heating and melting of a plane layer of alumina. A mathematical model of unsteady-state radiative-conductive heat transfer is used for considering the process of heating in rigorous formulation in view of the dependence of the thermophysical properties of the solid phase on temperature and of the optical properties—on temperature and wavelength, including the generalized approach to the problem of phase transition in melting in view of formation of an extended two-phase zone. In so doing, the evaporation from the melt surface is taken into account. The presented results relate to flux densities in the range from 200 to 3000 W/cm2. It is demonstrated that the special features of formation of temperature fields are due both to the contribution of volumetric radiation and absorption of fluxes of outer and self-radiation and to the specific nature of alumina for which the absorption coefficients of melt and of solid phase in the energetically important spectral region may differ by as much as two orders of magnitude.
Ending Page	565
Page Count	7
Starting Page	559
File Format	PDF
ISSN	0018151X
e-ISSN	16083156
Journal	High Temperature
Issue Number	4
Volume Number	47
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2009-08-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Atoms and Molecules in Strong Fields, Plasma Physics Mechanics, Fluids, Thermodynamics Materials Science Physical Chemistry Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Engineering Condensed Matter Physics

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