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An application of the level-set method in a finite element library for the simulation of the glass forming process is described. The forming process of containers (i.e bottles, jars) results in a thermomechanical problem with an evolving glass air interface posing a great challenge in modeling. The finite element method is used in our computations to accurately simulate the glass flow, the process' energy exchange with the heavily temperature dependent viscosity of the glass. Our model uses the level set method to track the glass-air interface. In this way remeshing can be avoided and computational costs can be significantly reduced. The glass-air interface can be seen as two interfaces: inner glass air interface and an outer glass-air interface. Thus, we solve two level set equations which allow us to apply the correct material parameters to the aforementioned equations without explicitly having to trace the glass surfaces. Numerical examples are provided tracking the glass-air interface of the blowing of a preform with non-uniform temperature.

Level-Set Method Used To Track The Glass-Air Interface In The Blow Step Of Glass Containers