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 TVT, 2009, Volume 47, Issue 4, Pages 589–596 (Mi tvt845)

Heat and Mass Transfer and Physical Gasdynamics

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

V. K. Bityukov, V. A. Petrov, I. V. Smirnov

Moscow State Institute of Radio-Engineering, Electronics and Automation (Technical University)

Abstract: A numerical investigation is performed of the effect of the density of a flux of heating concentrated radiation of $CO_2$ 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/cm$^2$. 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.

Full text: PDF file (736 kB)

English version:
High Temperature, 2009, 47:4, 559–565

Bibliographic databases:

UDC: 535.3+535.36+535.20

Citation: V. K. Bityukov, V. A. Petrov, I. V. Smirnov, “The effect of flux density on the formation of temperature field in alumina under conditions of heating by concentrated laser radiation”, TVT, 47:4 (2009), 589–596; High Temperature, 47:4 (2009), 559–565

Citation in format AMSBIB
\Bibitem{BitPetSmi09} \by V.~K.~Bityukov, V.~A.~Petrov, I.~V.~Smirnov \paper The effect of flux density on the formation of temperature field in alumina under conditions of heating by concentrated laser radiation \jour TVT \yr 2009 \vol 47 \issue 4 \pages 589--596 \mathnet{http://mi.mathnet.ru/tvt845} \transl \jour High Temperature \yr 2009 \vol 47 \issue 4 \pages 559--565 \crossref{https://doi.org/10.1134/S0018151X09040142} \isi{http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&DestLinkType=FullRecord&DestApp=ALL_WOS&KeyUT=000268784800013} \scopus{http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-68849106613} 

• http://mi.mathnet.ru/eng/tvt845
• http://mi.mathnet.ru/eng/tvt/v47/i4/p589

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Citing articles on Google Scholar: Russian citations, English citations
Related articles on Google Scholar: Russian articles, English articles

This publication is cited in the following articles:
1. Bityukov V.K., Petrov V.A., “the Brightness Temperature of Aluminum Oxide When It Is Heated By Concentrated Laser Radiation”, Meas. Tech., 57:6 (2014), 658–663
2. V. K. Bityukov, V. A. Petrov, I. V. Smirnov, “Influence of optical properties on the formation of temperature fields in aluminum oxide upon heating and melting by concentrated laser radiation”, High Temperature, 53:1 (2015), 27–35
3. V. A. Petrov, “Thermoradiation characteristics of refractory oxides upon heating by concentrated laser radiation”, High Temperature, 54:2 (2016), 186–196