T. Sato et Sm. Richardson, NUMERICAL-SIMULATION METHOD FOR VISCOELASTIC FLOWS WITH FREE SURFACES- FRINGE ELEMENT GENERATION METHOD, International journal for numerical methods in fluids, 19(7), 1994, pp. 555-574
To simulate filling flow in injection moulding for viscoelastic fluids
, a numerical method, based on a finite element method and a finite vo
lume method, has been developed for incompressible isothermal viscoela
stic flow with moving free surfaces. The advantages of this method are
, first, good applicability to arbitrarily shaped mould geometries and
, second, accurate treatment for boundary conditions on the free surfa
ce. Typical filling flows are simulated, namely filling flow into a 1:
4 expansion cavity with and without an obstacle. Numerical results pre
dict the position of weld lines and air-traps. The method also indicat
es the effects of elongational flow on molecular orientation.