Effect of wall emissivities on radiation heat transfer in glass tank forehearths

Abstract

In an earlier work, we had proposed a two-band, nongrey radiative transfer model for heat transfer in forehearths with simultaneous optically thick and thin approximations for molten glass interiors and at boundaries. Here using the same model, the radiative interaction of the top-crown and bottomrefratory walls with interior layers of shallow molton glass is studied by varying the wall emissivities. The forehearth exit temperature profiles for higher wall emissivities (0.9) show better conditioning of the glass for white flint glasses (optically thin).