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Modelling convective and radiative heat transfer in a glass melting model crucible

D. Cepite1 - A. Jakoviċs1 - B. Halbedel2

1 Faculty of Physics and Mathematics, University of Latvia, 8 Zellu, LV-1002, Riga, Latvia
2 Faculty of Mechanical Engineering, Technical University Ilmenau, Gustav-Kirchhoff-Strasse 6, D-98693 Ilmenau, Germany

Numerical modelling of thermally and electromagnetically driven semi-transparent glass melt flow in an experimental model crucible has been done using both constant and temperature dependent physical properties of the melt. Impact of heat conduction, thermal and EM convection as well as radiation heat transfer has been analysed. Influence of the absorption coefficient on the maximum temperature Tmax and temperature range ∆T in the melt has been estimated. Minima in dependencies Tmax and ∆T on the absorption coefficient have been perceived. In case of the temperature dependent physical properties, corresponding to a real glass composition, importance of the radiative heat transfer in reducing the risk of overheating the melt has been illustrated. Tables 2, Figs 6, Refs 5.

Magnetohydrodynamics 45, No. 4, 587-594, 2009 [PDF, 1.22 Mb]

Copyright: Institute of Physics, University of Latvia
Electronic edition ISSN 1574-0579
Printed edition ISSN 0024-998X