Theoretical Investigation Of Heat Transfer In Glass Formation

A theoretical study to investigate internal heat transfer in glass undergoing cooling between glass and mould, as well as plunger, during and after pressing, is described. A thermal model has been formulated to simulate the cooling. The heat transfer analysis accounts for the spectral nature of radiation in glass, the dependence of the thermophysical properties of glass on temperature, and the contact heat transfer between and after pressing, as well as subsequent cooling. Heat exchange between glass and mould by contact conduction across a very small gap and that by thermal radiation are considered separately.