Integration of time-dependent Material Models in CFD-Simulations of Extrusion Dies
In extrusion die design, the utilisation of 3D CFD simulations is state of the art. Thanks to cheap com-putational power, the meshes used are more and more refined resulting in a more accurate discretisa-tion. The modelling of the material behaviour has not seen such an improvement lately. As commonly known, during polymer processing the material shows an irreversible structural change resulting in deviating flow conditions and in consequence deviating product quality. This effect is also seen for polymers known as thermo-rheological stable. This work shows exemplary how to implement this ma-terial behaviour in commercial CFD solvers as a tool for extrusion die design.
pdf-file, 26 Pages, 1.4 MB
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