Computational modelling of the overflow of fusion process used to manufacture flat glass for use in TFT-LCDs was conducted. A model experiment using water glass flow as a stimulant for molten glass was conducted & compared with the results of computational modelling. The experiment proved that the Flow3D package was suitable for the modelling of molten glass flow. The numerical simulation results for molten glass flow over the trough during the overflow fusion process indicated that the radius on the top edges & tip angle at the bottom of the trough were two very important dimensions, especially the design of the tip angle. Only if the tip angle was reduced near to 20 degrees could steady flow & good merging & fusion of molten glass be obtained. The flow velocity & viscosity of molten glass were also important process parameters.
