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Two‐dimensional multilayer coextrusion flow in a flat coat‐hanger die. Part 2: Experiments and theoretical validation
Author(s) -
Puissant S.,
Vergnes B.,
Agassant J. F.,
Demay Y.,
Labaig J. J.
Publication year - 1996
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10481
Subject(s) - computation , die (integrated circuit) , materials science , lubrication , streamlines, streaklines, and pathlines , mechanics , mechanical engineering , flow (mathematics) , flow line , composite material , algorithm , computer science , engineering , physics , nanotechnology
In a previous paper (1), a two‐dimensional computation model for multilayer flows in coat‐hanger dies was proposed. It was based on lubrication approximation theory and enabled us to obtain the pressure field, the streamlines, and the interface positions in the whole die. The present paper is aimed to present experimental results obtained on an industrial line for a three‐layer configuration and to compare the results to the theoretical computation. The order of magnitude of pressure drops, flow rates, and interface positions were correctly predicted by the model. Some remaining discrepancies may be explained by the isothermal assumption and the lack of encapsulation mechanism in the computation.