Ceramics-Silikáty 51 (4) 225-234 (2007)

VERIFICATION OF REFINING MODELS AND THEIR APPLICATION

 J. Kloužek,  L. Němec,  M. Jebavá,  M. Trochta,  J. Brada

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.

Keywords: Glass melt, Bubble, Distribution, Models