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Filling thin cavities of variable gap thickness: A numerical and experimental investigation
Author(s) -
Hieber C. A.,
Socha L. S.,
Shen S. F.,
Wang K. K.,
Isayev A. I.
Publication year - 1983
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.760230106
Subject(s) - materials science , polypropylene , thermal conduction , mechanics , finite element method , polystyrene , composite material , thermodynamics , physics , polymer
A theoretical and experimental investigation is presented for filling thin cavities of variable gap thickness. The modeling is based upon a finite‐element/finite‐difference formulation for an inelastic power‐law fluid and includes the effects of viscous heating and conduction upon the flow dynamics. Extensive results are presented for polypropylene and polystyrene melts injected into two variable‐gap‐thickness cavities, of which one has an insert. Good agreement is found between the predictions and measurements concerning the shape of the advancing melt front, the location of weld lines, and the temporal pressure trace at various positions in the cavity.