2Outline Problem Statement Project Goal Modeling Solution Method ValidationResultsConclusions
3Problem Statement 1. Early Film Breakage 2. Draw Resonance Air Gap WidthDieWebChill RollOff-SetThickness
4Project GoalDesign and implement a method for analysis of stability of the film casting processDetermine the tolerance values of system parametersto keep the process stableReference: Silagy, D. et.al., Study of the Stability of the Film Casting Process, Polymer Engineering and Science, 36, no.21, 1996.
5Outline Modeling Problem Statement Project Goal Solution Method ValidationResultsConclusions
6Assumptions Polymer flow: Isothermal Elongational Inertia, gravity, and surface tension are neglectedKinematics’ Hypothesis (Silagy)membrane approximation1D modelCoordinates (x,y,z)Width (L)Thickness (e)Velocity (u)Length (X)Reference: Silagy, D. et.al., Study of the Stability of the Film Casting Process, Polymer Engineering and Science, 36, no.21, 1996.
18ConclusionsA numerical algorithm for the resolution of linear stability analysis was developedIt shows excellent performance (precision, low calculation time)The material rheological model explains the stabilization effect of LDPEThe algorithm can be applied to other similarly mathematical described processes.
19Acknowledgment Angela Sembiring (TU/e) Hong Xu (TU/e) Andriy Rychahyvskyy (TU/e)Jerome Claracq (Dow)Stef van Eijndhoven (TU/e)