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Transient free‐surface flows in injection mold filling
Author(s) -
Mavridis H.,
Hrymak A. N.,
Vlachopoulos J.
Publication year - 1988
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690340307
Subject(s) - free surface , discretization , mechanics , flow (mathematics) , transient (computer programming) , galerkin method , finite element method , fluid dynamics , computer simulation , deformation (meteorology) , surface (topology) , materials science , geometry , mathematics , physics , computer science , engineering , structural engineering , mathematical analysis , composite material , operating system
Advancing and colliding flow fronts are important fluid mechanical problems in injection mold filling. These are small‐scale, transient free‐surface flows with a significant impact on the molecular orientation of molded parts. This paper describes a numerical technique for the simulation of transient free‐surface flows. The algorithm combines a Galerkin/finite‐element discretization of the governing equations with a predictor‐corrector scheme for integration in time, and determines simultaneously the flow field and the free surface at every time step. The method is applied to the start‐up of a fluid flow initially at rest and impingement of two flow fronts to form a weldline. Comparison of simulation with available experiments on the start‐up problem shows very good agreement. Numerical tracking of fluid elements clarifies various aspects of flow‐induced deformation of the material.