Ceramics-Silikáty 51, (4) 225 - 234 (2007) |
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VERIFICATION OF REFINING MODELS AND THEIR APPLICATION
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Kloužek Jaroslav 1, Němec Lubomír 1, Jebavá Marcela 1,
Trochta Miroslav 2,
Brada Jiří 2
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1 Laboratory of Inorganic Materials,
Joint Workplace of the Institute of Inorganic Chemistry of the Academy of Sciences
of the Czech Republic and the Institute of Chemical Technology Prague,
Technická 5, 166 28 Prague, Czech Republic
2 Glass Service, Inc., Rokytnice 60, 755 01 Vsetín, Czech Republic
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Keywords: Glass melt, Bubble, Distribution, Models
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The study compares two models of single bubble behaviour in glass melts; the steady state complete model and the simplified
model utilizing the experimental data as are bubble growth rates and bubble stationary compositions. The verification of the
simplified model in quiescent melt and in a real melting space shows its acceptable applicability. In addition, two models of
bubble distribution in a melting space, the model of bubble representatives and the convective model, are presented. The verification
procedure for both distribution models in a simple plug-flow channel indicates that the model of bubble representatives
exhibits very acceptable accuracy and similar situation can be expected for more complicated melt convection. The
accuracy of the convective model of bubble distribution decreases with decreasing number of classes of bubble sizes, which
are used for the simulation. |
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